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Subtract 45/50 from 20/70

20/70 - 45/50 is -43/70.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 50 is 350
  2. For the 1st fraction, since 70 × 5 = 350,
    20/70 = 20 × 5/70 × 5 = 100/350
  3. Likewise, for the 2nd fraction, since 50 × 7 = 350,
    45/50 = 45 × 7/50 × 7 = 315/350
  4. Subtract the two fractions:
    100/350 - 315/350 = 100 - 315/350 = -215/350
  5. After reducing the fraction, the answer is -43/70

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