The graphical chart represents the proportion in percent between men andof men to women in academic staff amongfor seven faculties of a major university in 2012.

Overall, the chart demonstrates theshows a significant difference between the genders in particularcertain faculties.

"shows" and "certain" are maybe a bit easier for the reader to take in, given that the graph itself will present its own challenges. Several faculties have a significant difference, so I think "a" may be more appropriate in your sentence.

Four out of seven has a male domination in their staff, withare predominately male, while only two of faculties being overcomeare dominated by women.

The faculties which could be considered as male are business, engineering, law and science.

The Gender Representation in Academic StaffUniversity Faculties

The graphical chart represents the proportion in percent between men and women in academic staff among seven facultie shows the proportions of faculty by gender in seven departments of a major university in 2012.

Some notes:
*A graph is a type of chart. "graphical chart" is redundant.
*Proportion = how many fit the description out of a total population. "proportion in percent" is also redundant.
*At least in the U.S., we say department in this case instead of faculty. Faculty means the people on staff who teach, and a department consists of many faculty, staff, and students who study similar subjects. For example, the English department consists of literature, English history, grammar, etc. Each faculty member teaches a specific subject.
*Represent means a single item or group has the characteristics of a larger whole. A graph shows data and does not represent anything.

Sorry for the long explanation on this short sentence, but I figured I would explain some key words/concepts. I might sound tough on this correction :)

Overall, the chart demonstrates the significant difference between the genders in particular facultiedepartments.

Four out of seven hasve a male domination in their staff, with only two of faculties being overcome by womenjority of male faculty members, and two have a female majority.

Overcome means to invade/take over/occupy something that otherwise is not yours.

The disproportion might rise up tocould be 80 percent and evenor higher.

The faculties whichdepartments that could considered as male-dominated are business, engineering, law and science.

Women hadve the larger partroportion in arts and engineering.

Engineering is both male- and female-dominated?

The most male faculty, with just over 80 percent of men, is engineeringEngineering has the largest proportion of men versus women with 80 percent.

Opposite to it is the education faculty, the female domination of which was showing roughly the same resultThe education department has the opposite proportion of 80 percent women versus men.

Other male overwhelming facultie-dominant departments were business and science, having twice as muchany men than women in their academic staff.

Many = you can count how many things (people in this case)
Much = not able to easily count
For example: I have many friends versus I have much happiness.

Law facultyies had a proportion of 60/40 with a moderate domination of , men to women.

Female academic members overcome the male ones in arts faculty with a slight difference of 10 percent approximately 10 percent.

Either way is fine. I would rather place the adjective first.

Lastly, it is medicineal faculty that had an almost accurateeven balance in both genders.

The Gender Representation inAmong Academic Staffs

Theis graphical chart represents the proportion in percent betweenage terms of men and women in academic staff among seven faculties of a major university in 2012.

"The" is grammatically fine, but at the beginning of a discussion in reference to a specific chart, "this" makes more sense.

Overall, the chart demonillustrates thea significant difference between the gendersexes in particular faculties.

"Demonstrate" is used more for examples. Here it doesn't work because the chart just describes the situation.

"Sexes" sounds better than "genders" to me in this type of situation, although in certain subcultures (like certain strands of feminism), "genders" might be more common, for political reasons.

Four out of seven hasve a male dominatiojority of men in their staff, with only two of faculties being overcomedominated by women.

The disproportionlack of balance might rise up to 80 percent andor even higher.

Women had the larger partve greater representation in arts and engineering.

You've been using the present tense to describe the situation, which is fine, but this means that this can't be in the past tense.

I think "majority" could also work as a replacement for "larger part."

"Engineering" looks like a typo here.

The most male-dominated faculty, with just over 80 percent of men, is engineering.

Opposite to it is the education faculty, the female domination of which was showing roughly the same resultwhich is dominated by roughly the same proportion of women.

Other male overwhelmingly male faculties were business and science, having twice as muchany men thanas women in their academic staff.

"Men" are countable, so we use "many."

LThe law faculty had a proportion of 60/40 with a moderate domination of men.

Female academic members overcome the male ones instaff overtook male staff in the arts faculty with a slight difference of 10 percent approximately 10 percent.

Lastly, it is the medicineal faculty that had an almost accurate balance in bothequal balance between genders.

Overall, the chart demonstrates the significant difference between the genders inmen and women in these particular faculties.

Four out of seven hasve a male -domination in their staff, withed staff, meanwhile only two of faculties beingare overcomerun by women.

Theis disproportion might rise up to 80 percent and possibly even higher.

The faculties which could be considered as male are business, engineering, law and science.

Women hadve the larger part in arts and engineeringducation.

The most male-populated faculty, with just over 80 percent of the staff being men, is engineering.

OIn opposite to it is the education faculty,ion to the engineering department is the female -domination ofed education faculty, which whas showing roughly the same resultoverpowering difference, but rather with women.

Other male -overwhelming faculties were business and science, having twice as much men thanas women in their academic staff.

Female academic members overcomerun their male ones incounterparts in the arts faculty with a slight difference of 10 percent approximately 10 percent.

Lastly, it isthe medicine faculty that hads an almost accurate balance in both genders.