4/7 of marbles are blue in 4/21 of marbles are red how many times more blue marbles do you have been red

asked Feb 27, 2016 102k views

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5 votes

convert bottom number to same number
4/7 times 3/3=12/21
12/21=blue
4/21=red
how many more blue than red
12/21-4/21=8/21

Ademarizu answered Mar 4, 2016

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