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Subtract 18/16 from 21/15

1st number: 1 6/15, 2nd number: 1 2/16

21/15 - 18/16 is 11/40.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 16 is 240

    Next, find the equivalent fraction of both fractional numbers with denominator 240
  2. For the 1st fraction, since 15 × 16 = 240,
    21/15 = 21 × 16/15 × 16 = 336/240
  3. Likewise, for the 2nd fraction, since 16 × 15 = 240,
    18/16 = 18 × 15/16 × 15 = 270/240
  4. Subtract the two like fractions:
    336/240 - 270/240 = 336 - 270/240 = 66/240
  5. After reducing the fraction, the answer is 11/40

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