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Subtract 21/5 from 3/16

1st number: 3/16, 2nd number: 4 1/5

3/16 - 21/5 is -321/80.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 16 and 5 is 80

    Next, find the equivalent fraction of both fractional numbers with denominator 80
  2. For the 1st fraction, since 16 × 5 = 80,
    3/16 = 3 × 5/16 × 5 = 15/80
  3. Likewise, for the 2nd fraction, since 5 × 16 = 80,
    21/5 = 21 × 16/5 × 16 = 336/80
  4. Subtract the two like fractions:
    15/80 - 336/80 = 15 - 336/80 = -321/80

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