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Subtract 18/30 from 7/8

7/8 - 18/30 is 11/40.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 30 is 120

    Next, find the equivalent fraction of both fractional numbers with denominator 120
  2. For the 1st fraction, since 8 × 15 = 120,
    7/8 = 7 × 15/8 × 15 = 105/120
  3. Likewise, for the 2nd fraction, since 30 × 4 = 120,
    18/30 = 18 × 4/30 × 4 = 72/120
  4. Subtract the two like fractions:
    105/120 - 72/120 = 105 - 72/120 = 33/120
  5. After reducing the fraction, the answer is 11/40

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