数学怎么算的算不好.(100%/60%)* 4% (100%/70%)*4%=?第一个怎么算的可以=6.7 (100%/60%)*_数学解答

数学怎么算的算不好.
(100%/60%)* 4% (100%/70%)*4%=?
第一个怎么算的可以=6.7 (100%/60%)* 4% =6.7 第二个我都算不好了.

人气：445 ℃　时间：2020-05-25 06:33:53

解答

原式化简
(100 / 60) * 4% = 1/15
(100 / 70) * 4% = 4/70 = 2/35