how do you write a proportion and solve 54 is what percent of 135
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What proportion is 54 of 135? It's 54/135 which cancels down to 6/15 (dividing by 9) then 2/5 (dividing by 3). Use the same proportion to get percentage by applying it to 100: 2/5*100=40% (5 goes into 100 20 times multiplied by 2 is 40).
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