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Subtract 42/10 from 70/80

1st number: 70/80, 2nd number: 4 2/10

70/80 - 42/10 is -133/40.

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,
    42/10 = 42 × 8/10 × 8 = 336/80
  4. Subtract the two fractions:
    70/80 - 336/80 = 70 - 336/80 = -266/80
  5. After reducing the fraction, the answer is -133/40

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