When the price of an article was reduced by 40%, its sale increased by 60%. What was the net effect on the revenue from sales?

In a town with 30,000 professionals, teachers make up 11% of the total professionals. If 46% of teachers are male, what is the number of female teachers in the town?

In a town's professional breakdown, doctors represent 18% and clerks represent 8% of the total professionals. If the number of doctors is 3000 greater than the number of clerks, what is the total number of professionals in the town?

If the number of students in M.B.A is 380, in M.Sc is 420, and in B.Sc is 500, then the number of students in M.B.A is approximately what percent of the total number of students in M.Sc and B.Sc together?

If there are 220 students in B.Tech course and 140 students in M.Tech course, then the number of students in B.Tech is approximately what percent more than the number of students in M.Tech?

If the export of a commodity increased from 15 units in 2006 to 38 units in 2007, what was the percentage increase in exports?

In a competition, each participant took up singing or dancing or both. 64% took up singing and 56% took up dancing. If the total number of participants was 175, how many participants took part in both singing and dancing?

A farmer increased the area of his rectangular farm by increasing its length by 35% and decreasing its width by 18%. The area of the new farm:

The number of students in school A who participated in the function is what percentage of the number of boys in that school?