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Subtract 28/10 from 70/80

1st number: 70/80, 2nd number: 2 8/10

70/80 - 28/10 is -77/40.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 10 is 80
  2. For the 1st fraction, since 80 × 1 = 80,
    70/80 = 70 × 1/80 × 1 = 70/80
  3. Likewise, for the 2nd fraction, since 10 × 8 = 80,
    28/10 = 28 × 8/10 × 8 = 224/80
  4. Subtract the two fractions:
    70/80 - 224/80 = 70 - 224/80 = -154/80
  5. After reducing the fraction, the answer is -77/40

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