29+ =100 45+ =100 13+ =10073+ =100 62+ =100 37+ =100.
4÷ = :10=50%=24÷ = (小数)
.
:4═12÷ =0.75= %= 折.
A除以B的商是,那么B与A的比是 ,比值是 .
12﹕ ==18﹕ .