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Subtract 40/21 from 40/36

1st number: 1 4/36, 2nd number: 1 19/21

40/36 - 40/21 is -50/63.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 36 and 21 is 252

    Next, find the equivalent fraction of both fractional numbers with denominator 252
  2. For the 1st fraction, since 36 × 7 = 252,
    40/36 = 40 × 7/36 × 7 = 280/252
  3. Likewise, for the 2nd fraction, since 21 × 12 = 252,
    40/21 = 40 × 12/21 × 12 = 480/252
  4. Subtract the two like fractions:
    280/252 - 480/252 = 280 - 480/252 = -200/252
  5. After reducing the fraction, the answer is -50/63

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