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Subtract 21/64 from 8/70

8/70 - 21/64 is -479/2240.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 64 is 2240

    Next, find the equivalent fraction of both fractional numbers with denominator 2240
  2. For the 1st fraction, since 70 × 32 = 2240,
    8/70 = 8 × 32/70 × 32 = 256/2240
  3. Likewise, for the 2nd fraction, since 64 × 35 = 2240,
    21/64 = 21 × 35/64 × 35 = 735/2240
  4. Subtract the two like fractions:
    256/2240 - 735/2240 = 256 - 735/2240 = -479/2240

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