Question

数学题数学题数学题

80减少到50,减少了（ ）%,40增加30,增加了（ ）％

Answer 1

(80-50)/80=37.5%

30/40=75%

Answer 2

37.5 % 75%

Answer 3

(80-50)/80*=37.5%
30/40=75%

Answer 4

37.5% 75%