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Subtract 21/30 from 7/16

7/16 - 21/30 is -21/80.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 16 and 30 is 240

    Next, find the equivalent fraction of both fractional numbers with denominator 240
  2. For the 1st fraction, since 16 × 15 = 240,
    7/16 = 7 × 15/16 × 15 = 105/240
  3. Likewise, for the 2nd fraction, since 30 × 8 = 240,
    21/30 = 21 × 8/30 × 8 = 168/240
  4. Subtract the two like fractions:
    105/240 - 168/240 = 105 - 168/240 = -63/240
  5. After reducing the fraction, the answer is -21/80

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