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Subtract 21/4 from 90/8

1st number: 11 2/8, 2nd number: 5 1/4

90/8 - 21/4 is 6/1.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 4 is 8

    Next, find the equivalent fraction of both fractional numbers with denominator 8
  2. For the 1st fraction, since 8 × 1 = 8,
    90/8 = 90 × 1/8 × 1 = 90/8
  3. Likewise, for the 2nd fraction, since 4 × 2 = 8,
    21/4 = 21 × 2/4 × 2 = 42/8
  4. Subtract the two like fractions:
    90/8 - 42/8 = 90 - 42/8 = 48/8
  5. After reducing the fraction, the answer is 6/1

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