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20 and 40 are the common denominator

The common denominators for 1/4 and 7/10 are 20 and 40

Given:

1/4

7/10

  • Numerators are the upper value or top value in a fraction

  • Denominators are the lower value or bottom value in a fraction

The denominators are 4 and 10 respectively in the given fraction

  • Find the common multiples of 4 and 20

4 = 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44

10 = 10, 20, 30, 40, 50

The common multiples are 20 and 40

Therefore, the common denominators are 20 and 40

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