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Subtract 30/63 from 42/45

42/45 - 30/63 is 16/35.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 63 is 315

    Next, find the equivalent fraction of both fractional numbers with denominator 315
  2. For the 1st fraction, since 45 × 7 = 315,
    42/45 = 42 × 7/45 × 7 = 294/315
  3. Likewise, for the 2nd fraction, since 63 × 5 = 315,
    30/63 = 30 × 5/63 × 5 = 150/315
  4. Subtract the two like fractions:
    294/315 - 150/315 = 294 - 150/315 = 144/315
  5. After reducing the fraction, the answer is 16/35

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