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Subtract 7/80 from 21/15

1st number: 1 6/15, 2nd number: 7/80

21/15 - 7/80 is 21/16.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 80 is 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 80 × 3 = 240,
    7/80 = 7 × 3/80 × 3 = 21/240
  4. Subtract the two fractions:
    336/240 - 21/240 = 336 - 21/240 = 315/240
  5. After reducing the fraction, the answer is 21/16
  6. In mixed form: 15/16

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