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Subtract 1/18 from 21/10

1st number: 2 1/10, 2nd number: 1/18

21/10 - 1/18 is 92/45.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 18 is 90

    Next, find the equivalent fraction of both fractional numbers with denominator 90
  2. For the 1st fraction, since 10 × 9 = 90,
    21/10 = 21 × 9/10 × 9 = 189/90
  3. Likewise, for the 2nd fraction, since 18 × 5 = 90,
    1/18 = 1 × 5/18 × 5 = 5/90
  4. Subtract the two like fractions:
    189/90 - 5/90 = 189 - 5/90 = 184/90
  5. After reducing the fraction, the answer is 92/45
  6. In mixed form: 22/45

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