( )÷12=12÷( )=0.75=( )

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( )÷12=12÷( )=0.75=( )
( )÷12=12÷( )=0.75=( )

( )÷12=12÷( )=0.75=( )
(9 )÷12=12÷(16 )=0.75=(3/4 )

9 16 3/4

( 9)÷12=12÷( 16)=0.75=( 75%)

倒着算
0.75=3/4
12÷ x=3/4 交叉相乘3x=48 x=16
x÷12=3/4 交叉相乘 4x=36 x=9