3/4吨菜子出油2/7吨,照这样计算,5/6吨菜子可出油多少吨?(用比例解)

问题描述:

3/4吨菜子出油2/7吨,照这样计算,5/6吨菜子可出油多少吨?(用比例解)

设5/6吨菜籽可出油x吨,根据每吨菜籽出油相等,可得比例:
3/4:2/7=5/6:x
(3/4)x=2/7×5/6
(3/4)x=5/21
x=5/21÷3/4
x=5/21×4/3
x=20/63
答:5/6吨菜籽可出油20/63吨.