find the LCM and hcf 2/7,3/16,2/5
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(1) LCM of numerators ~ (2,3,5) = 30
HCF of denominators ~ (7,14,3) = 1
So LCM = 30/1= 30
(2) HCF of numerators (2,3,5) = 1
LCM of denominators (7,14,3) = 42
So HCF = 1/42
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