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Subtract 16/42 from 20/35

20/35 - 16/42 is 4/21.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 35 and 42 is 210
  2. For the 1st fraction, since 35 × 6 = 210,
    20/35 = 20 × 6/35 × 6 = 120/210
  3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
    16/42 = 16 × 5/42 × 5 = 80/210
  4. Subtract the two fractions:
    120/210 - 80/210 = 120 - 80/210 = 40/210
  5. After reducing the fraction, the answer is 4/21

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