( ):30%=( )%=0.6=12÷( )=( )(填分数)

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():30%=()%=0.6=12÷()=()(填分数)():30%=()%=0.6=12÷()=()(填分数)():30%=()%=0.6=12÷()=()(填分数)(9/50):30%=(60)%

( ):30%=( )%=0.6=12÷( )=( )(填分数)
( ):30%=( )%=0.6=12÷( )=( )(填分数)

( ):30%=( )%=0.6=12÷( )=( )(填分数)
(9/50):30%=(60)%=0.6=12/(20)=3/5