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Subtract 1/8 from 42/15

1st number: 2 12/15, 2nd number: 1/8

42/15 - 1/8 is 107/40.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 8 is 120
  2. For the 1st fraction, since 15 × 8 = 120,
    42/15 = 42 × 8/15 × 8 = 336/120
  3. Likewise, for the 2nd fraction, since 8 × 15 = 120,
    1/8 = 1 × 15/8 × 15 = 15/120
  4. Subtract the two fractions:
    336/120 - 15/120 = 336 - 15/120 = 321/120
  5. After reducing the fraction, the answer is 107/40
  6. In mixed form: 227/40

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