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Subtract 4/90 from 70/80

70/80 - 4/90 is 299/360.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 90 is 720
  2. For the 1st fraction, since 80 × 9 = 720,
    70/80 = 70 × 9/80 × 9 = 630/720
  3. Likewise, for the 2nd fraction, since 90 × 8 = 720,
    4/90 = 4 × 8/90 × 8 = 32/720
  4. Subtract the two fractions:
    630/720 - 32/720 = 630 - 32/720 = 598/720
  5. After reducing the fraction, the answer is 299/360

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