SOLUTION: how to multiply 20/12 X 9/15

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Question 789541: how to multiply 20/12 X 9/15
Answer by waynest(281) About Me  (Show Source):
You can put this solution on YOUR website!
cross multiply
(20/12) x (9/15)
divide 20 and 15 by 5 and 9 and 12 by 3
(4/4) x (3/3)
1 x 1 = 1