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Subtract 90/70 from 81/48

1st number: 1 33/48, 2nd number: 1 20/70

81/48 - 90/70 is 45/112.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 48 and 70 is 1680
  2. For the 1st fraction, since 48 × 35 = 1680,
    81/48 = 81 × 35/48 × 35 = 2835/1680
  3. Likewise, for the 2nd fraction, since 70 × 24 = 1680,
    90/70 = 90 × 24/70 × 24 = 2160/1680
  4. Subtract the two fractions:
    2835/1680 - 2160/1680 = 2835 - 2160/1680 = 675/1680
  5. After reducing the fraction, the answer is 45/112

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