汽车销量从10.7million降到9.3.THe decrease was closest to what percent?1%_数学解答

汽车销量从10.7million降到9.3.THe decrease was closest to what percent?
1% 13% 14% 15% 20%
像这种题怎么做,怎么列算式

人气：181 ℃　时间：2020-04-30 16:38:41

解答

(10.7-9.3)/10.7*100%=13.1%
选B
用减少的量除以与拿来的量就好