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Subtract 80/70 from 70/63

1st number: 1 7/63, 2nd number: 1 10/70

70/63 - 80/70 is -2/63.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 63 and 70 is 630
  2. For the 1st fraction, since 63 × 10 = 630,
    70/63 = 70 × 10/63 × 10 = 700/630
  3. Likewise, for the 2nd fraction, since 70 × 9 = 630,
    80/70 = 80 × 9/70 × 9 = 720/630
  4. Subtract the two fractions:
    700/630 - 720/630 = 700 - 720/630 = -20/630
  5. After reducing the fraction, the answer is -2/63

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