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Subtract 18/20 from 98/70

1st number: 1 28/70, 2nd number: 18/20

98/70 - 18/20 is 1/2.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 20 is 140
  2. For the 1st fraction, since 70 × 2 = 140,
    98/70 = 98 × 2/70 × 2 = 196/140
  3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
    18/20 = 18 × 7/20 × 7 = 126/140
  4. Subtract the two fractions:
    196/140 - 126/140 = 196 - 126/140 = 70/140
  5. After reducing the fraction, the answer is 1/2

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