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Subtract 20/70 from 3/50

3/50 - 20/70 is -79/350.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 50 and 70 is 350
  2. For the 1st fraction, since 50 × 7 = 350,
    3/50 = 3 × 7/50 × 7 = 21/350
  3. Likewise, for the 2nd fraction, since 70 × 5 = 350,
    20/70 = 20 × 5/70 × 5 = 100/350
  4. Subtract the two fractions:
    21/350 - 100/350 = 21 - 100/350 = -79/350

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