Question

一知a是b的75％,b是c的90％,求a:b:c.

Answer 1

a=75%b=75%*90%c=67.5%c,

a:b=75%=75:100=67.5:90

b:c=90%=90:100

a:b:c=67.5:90:100=675:900:1000=27:36:40