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Subtract 21/90 from 42/2

1st number: 21 0/2, 2nd number: 21/90

42/2 - 21/90 is 623/30.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 2 and 90 is 90

    Next, find the equivalent fraction of both fractional numbers with denominator 90
  2. For the 1st fraction, since 2 × 45 = 90,
    42/2 = 42 × 45/2 × 45 = 1890/90
  3. Likewise, for the 2nd fraction, since 90 × 1 = 90,
    21/90 = 21 × 1/90 × 1 = 21/90
  4. Subtract the two like fractions:
    1890/90 - 21/90 = 1890 - 21/90 = 1869/90
  5. After reducing the fraction, the answer is 623/30
  6. In mixed form: 2023/30

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