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Subtract 7/80 from 4/70

4/70 - 7/80 is -17/560.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 80 is 560

    Next, find the equivalent fraction of both fractional numbers with denominator 560
  2. For the 1st fraction, since 70 × 8 = 560,
    4/70 = 4 × 8/70 × 8 = 32/560
  3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
    7/80 = 7 × 7/80 × 7 = 49/560
  4. Subtract the two like fractions:
    32/560 - 49/560 = 32 - 49/560 = -17/560

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