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Subtract 7/90 from 42/12

1st number: 3 6/12, 2nd number: 7/90

42/12 - 7/90 is 154/45.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 90 is 180
  2. For the 1st fraction, since 12 × 15 = 180,
    42/12 = 42 × 15/12 × 15 = 630/180
  3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
    7/90 = 7 × 2/90 × 2 = 14/180
  4. Subtract the two fractions:
    630/180 - 14/180 = 630 - 14/180 = 616/180
  5. After reducing the fraction, the answer is 154/45
  6. In mixed form: 319/45

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