rewrite2/5 and 17/20 so that they have a common denominator
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to write 2/5 and 17/20 on a common denominator we need to remove lcn of denominators so lcm of 5 and 20 is 100 so 2/5
2×20/5×20 gives 40/100 and 17×5/20×5 gives
85/100.So finally 40/100 and 85/100 have same denominators
2×20/5×20 gives 40/100 and 17×5/20×5 gives
85/100.So finally 40/100 and 85/100 have same denominators
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