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Subtract 1/40 from 21/16

1st number: 1 5/16, 2nd number: 1/40

21/16 - 1/40 is 103/80.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 16 and 40 is 80

    Next, find the equivalent fraction of both fractional numbers with denominator 80
  2. For the 1st fraction, since 16 × 5 = 80,
    21/16 = 21 × 5/16 × 5 = 105/80
  3. Likewise, for the 2nd fraction, since 40 × 2 = 80,
    1/40 = 1 × 2/40 × 2 = 2/80
  4. Subtract the two like fractions:
    105/80 - 2/80 = 105 - 2/80 = 103/80
  5. In mixed form: 123/80

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