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Subtract 42/48 from 70/90

70/90 - 42/48 is -7/72.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 48 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 48 × 15 = 720,
    42/48 = 42 × 15/48 × 15 = 630/720
  4. Subtract the two fractions:
    560/720 - 630/720 = 560 - 630/720 = -70/720
  5. After reducing the fraction, the answer is -7/72

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