兄弟三人比身高,老大比老二高30%,老二比老三高30%,那么老大比老三高百分之几?
问题描述：
兄弟三人比身高,老大比老二高30%,老二比老三高30%,那么老大比老三高百分之几?
答
设老三为1,
老二=1+0.3=1.3 (老二比老三高30%)
老大=1.3+1.3×0.3=1.69 (老大比老二高30%)
老大比老三高1.69-1=0.69=69%