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Subtract 63/16 from 70/90

1st number: 70/90, 2nd number: 3 15/16

70/90 - 63/16 is -455/144.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 16 is 720
  2. For the 1st fraction, since 90 × 8 = 720,
    70/90 = 70 × 8/90 × 8 = 560/720
  3. Likewise, for the 2nd fraction, since 16 × 45 = 720,
    63/16 = 63 × 45/16 × 45 = 2835/720
  4. Subtract the two fractions:
    560/720 - 2835/720 = 560 - 2835/720 = -2275/720
  5. After reducing the fraction, the answer is -455/144

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