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Subtract 12/10 from 25/42

1st number: 25/42, 2nd number: 1 2/10

25/42 - 12/10 is -127/210.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 10 is 210
  2. For the 1st fraction, since 42 × 5 = 210,
    25/42 = 25 × 5/42 × 5 = 125/210
  3. Likewise, for the 2nd fraction, since 10 × 21 = 210,
    12/10 = 12 × 21/10 × 21 = 252/210
  4. Subtract the two fractions:
    125/210 - 252/210 = 125 - 252/210 = -127/210

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