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Subtract 42/45 from 90/5

1st number: 18 0/5, 2nd number: 42/45

90/5 - 42/45 is 256/15.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 45 is 45
  2. For the 1st fraction, since 5 × 9 = 45,
    90/5 = 90 × 9/5 × 9 = 810/45
  3. Likewise, for the 2nd fraction, since 45 × 1 = 45,
    42/45 = 42 × 1/45 × 1 = 42/45
  4. Subtract the two fractions:
    810/45 - 42/45 = 810 - 42/45 = 768/45
  5. After reducing the fraction, the answer is 256/15
  6. In mixed form: 171/15

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