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Subtract 21/8 from 49/70

1st number: 49/70, 2nd number: 2 5/8

49/70 - 21/8 is -77/40.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 8 is 280

    Next, find the equivalent fraction of both fractional numbers with denominator 280
  2. For the 1st fraction, since 70 × 4 = 280,
    49/70 = 49 × 4/70 × 4 = 196/280
  3. Likewise, for the 2nd fraction, since 8 × 35 = 280,
    21/8 = 21 × 35/8 × 35 = 735/280
  4. Subtract the two like fractions:
    196/280 - 735/280 = 196 - 735/280 = -539/280
  5. After reducing the fraction, the answer is -77/40

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