( )/15=30/824=5/4=10/8=80%

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( )/15=30/824=5/4=10/8=80%

( )/15=30/824=5/4=10/8=80%
( )/15=30/824=5/4=10/8=80%

( )/15=30/824=5/4=10/8=80%
2

【12】/15=30/824=5/4=10/8=80%
或许你的意思是【18.25】分之15

12

( 18.75 )/15=30/24=5/4=10/8=80%
这样式子才满足相等!
你这边a/b是a分之b吗??如果是那就对了!