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Subtract 42/40 from 20/7

1st number: 2 6/7, 2nd number: 1 2/40

20/7 - 42/40 is 253/140.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 40 is 280

    Next, find the equivalent fraction of both fractional numbers with denominator 280
  2. For the 1st fraction, since 7 × 40 = 280,
    20/7 = 20 × 40/7 × 40 = 800/280
  3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
    42/40 = 42 × 7/40 × 7 = 294/280
  4. Subtract the two like fractions:
    800/280 - 294/280 = 800 - 294/280 = 506/280
  5. After reducing the fraction, the answer is 253/140
  6. In mixed form: 1113/140

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