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Subtract 70/64 from 28/90

1st number: 28/90, 2nd number: 1 6/64

28/90 - 70/64 is -1127/1440.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 64 is 2880

    Next, find the equivalent fraction of both fractional numbers with denominator 2880
  2. For the 1st fraction, since 90 × 32 = 2880,
    28/90 = 28 × 32/90 × 32 = 896/2880
  3. Likewise, for the 2nd fraction, since 64 × 45 = 2880,
    70/64 = 70 × 45/64 × 45 = 3150/2880
  4. Subtract the two like fractions:
    896/2880 - 3150/2880 = 896 - 3150/2880 = -2254/2880
  5. After reducing the fraction, the answer is -1127/1440

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