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Subtract 42/72 from 90/16

1st number: 5 10/16, 2nd number: 42/72

90/16 - 42/72 is 121/24.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 16 and 72 is 144
  2. For the 1st fraction, since 16 × 9 = 144,
    90/16 = 90 × 9/16 × 9 = 810/144
  3. Likewise, for the 2nd fraction, since 72 × 2 = 144,
    42/72 = 42 × 2/72 × 2 = 84/144
  4. Subtract the two fractions:
    810/144 - 84/144 = 810 - 84/144 = 726/144
  5. After reducing the fraction, the answer is 121/24
  6. In mixed form: 51/24

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