英语数学题求解~~if x percent of 500 is y,what is y percent of 10x?A

if x percent of 500 is y,what is y percent of 10x?如果500的x%是y,那么10x的y%是多少?x percent of z is y,这个短语举例来说,10 percent of the population is 1530 人口的10%是1530 由题得①500 * x% = y②10x * y% = ?由①得 y = 500 * x /100 = 5x带入② 10x * 5x /100 = 50x^2 /100 =（x^2) /2∴选BA。50xB。（x^2）/2C。2/5xD。5(X^2)E。(x^2)/5