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Subtract 70/20 from 42/50

1st number: 42/50, 2nd number: 3 10/20

42/50 - 70/20 is -133/50.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 50 and 20 is 100

    Next, find the equivalent fraction of both fractional numbers with denominator 100
  2. For the 1st fraction, since 50 × 2 = 100,
    42/50 = 42 × 2/50 × 2 = 84/100
  3. Likewise, for the 2nd fraction, since 20 × 5 = 100,
    70/20 = 70 × 5/20 × 5 = 350/100
  4. Subtract the two like fractions:
    84/100 - 350/100 = 84 - 350/100 = -266/100
  5. After reducing the fraction, the answer is -133/50

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