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Subtract 20/60 from 90/84

1st number: 1 6/84, 2nd number: 20/60

90/84 - 20/60 is 31/42.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 60 is 420
  2. For the 1st fraction, since 84 × 5 = 420,
    90/84 = 90 × 5/84 × 5 = 450/420
  3. Likewise, for the 2nd fraction, since 60 × 7 = 420,
    20/60 = 20 × 7/60 × 7 = 140/420
  4. Subtract the two fractions:
    450/420 - 140/420 = 450 - 140/420 = 310/420
  5. After reducing the fraction, the answer is 31/42

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