Question

By what no should 2/7 be divided to get 8/21

Answer 1

Let divide by x
2/7/x=8/21
2/7x=8/21
1/x=4/3
X=3/4

Answer 2

Step-by-step explanation:

Let the number divided be X

2/7 ÷ x = 8/21

2/7 × 1/x = 8/21

2/7x = 8/21

2×21 = 8×7x (cross multiplication)

42 = 56x

42/56 = x (by bringing 56 to L.H.S it became in the form of division)

3/4 = x

Therefore , the number divided by 2/7 to get 8/21 will be 3/4

Hope it helps!

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