18%:20分之3=6.

问题描述:

18%:20分之3=6.

18%:20分之3=6.5分之x
6:5=x/6.5
x/6.5=1.2
x=1.2×6.5
x=7.8

3x/20=18%*6.5
0.15x=0.18*6.5
x=0.18*6.5/15
x=0.078=7.8%

6.5分之X=x/6.5
x/6.5=1.2
x=1.2×6.5
x=7.8