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Subtract 30/4 from 18/8

1st number: 2 2/8, 2nd number: 7 2/4

18/8 - 30/4 is -21/4.

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,
    18/8 = 18 × 1/8 × 1 = 18/8
  3. Likewise, for the 2nd fraction, since 4 × 2 = 8,
    30/4 = 30 × 2/4 × 2 = 60/8
  4. Subtract the two like fractions:
    18/8 - 60/8 = 18 - 60/8 = -42/8
  5. After reducing the fraction, the answer is -21/4

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