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Subtract 21/84 from 7/5

1st number: 1 2/5, 2nd number: 21/84

7/5 - 21/84 is 23/20.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 84 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 5 × 84 = 420,
    7/5 = 7 × 84/5 × 84 = 588/420
  3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
    21/84 = 21 × 5/84 × 5 = 105/420
  4. Subtract the two like fractions:
    588/420 - 105/420 = 588 - 105/420 = 483/420
  5. After reducing the fraction, the answer is 23/20
  6. In mixed form: 13/20

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