Question

express the of 21/35 and 35/21 en slandard form
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Answer 1

21/35 = (3×7)/(5×7) = 3/5

Find the GCD (or HCF) of numerator and denominator

GCD of 35 and 21 is 7

Divide both the numerator and denominator by the GCD

35 ÷ 7

21 ÷ 7

Therefore, 35/21 standard form of  5/3.