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Subtract 3/18 from 21/20

1st number: 1 1/20, 2nd number: 3/18

21/20 - 3/18 is 53/60.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 18 is 180
  2. For the 1st fraction, since 20 × 9 = 180,
    21/20 = 21 × 9/20 × 9 = 189/180
  3. Likewise, for the 2nd fraction, since 18 × 10 = 180,
    3/18 = 3 × 10/18 × 10 = 30/180
  4. Subtract the two fractions:
    189/180 - 30/180 = 189 - 30/180 = 159/180
  5. After reducing the fraction, the answer is 53/60

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