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Subtract 21/20 from 90/35

1st number: 2 20/35, 2nd number: 1 1/20

90/35 - 21/20 is 213/140.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 35 and 20 is 140

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 35 × 4 = 140,
    90/35 = 90 × 4/35 × 4 = 360/140
  3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
    21/20 = 21 × 7/20 × 7 = 147/140
  4. Subtract the two like fractions:
    360/140 - 147/140 = 360 - 147/140 = 213/140
  5. In mixed form: 173/140

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