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Subtract 18/20 from 1/35

1/35 - 18/20 is -61/70.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 35 and 20 is 140
  2. For the 1st fraction, since 35 × 4 = 140,
    1/35 = 1 × 4/35 × 4 = 4/140
  3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
    18/20 = 18 × 7/20 × 7 = 126/140
  4. Subtract the two fractions:
    4/140 - 126/140 = 4 - 126/140 = -122/140
  5. After reducing the fraction, the answer is -61/70

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