题目是这样的: Mary's income is 60 percent more than Tim's income, and Tim's income is 40 percent less than Juan's income. What percent of Juan's income is Mary's income? A.124% B.120% C.96% D.80% E.64% 我想问的是对于问题的理解。应该要求的是J是M的比例还是M是J的比例?我自己的理解是J是M的,但是感觉OG的解释是M是J的~麻烦大家帮我分析一下,谢谢啦!!