求问一道GRE数学题,答案为540,怎么算的?TheenrollmentsatcollegeXandcollegeYbothgrewby8percentfrom1980to1985.iftheenrollmentsatcollegeXgrewby800andtheenrollmentsatcollegeYgrewby840,theenrollmentsatcolleg

Question

求问一道GRE数学题,答案为540,怎么算的?
The enrollments at college X and college Y both grew by 8 percent from 1980 to 1985 .if the enrollments at college X grew by 800 and the enrollments at college Y grew by 840,the enrollments at college Y Was how much greater than the enrollments at college X in 1985?

Answer 1

800除以8%等于10000；这是X大学1980的人数,加上800=10800是1985年的人数
840除以8%等于10500；这是Y大学1980的人数,加上840=11340是1985年的人数
相减就是相差的人数540