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Subtract 70/40 from 21/2

1st number: 10 1/2, 2nd number: 1 30/40

21/2 - 70/40 is 35/4.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 2 and 40 is 40

    Next, find the equivalent fraction of both fractional numbers with denominator 40
  2. For the 1st fraction, since 2 × 20 = 40,
    21/2 = 21 × 20/2 × 20 = 420/40
  3. Likewise, for the 2nd fraction, since 40 × 1 = 40,
    70/40 = 70 × 1/40 × 1 = 70/40
  4. Subtract the two like fractions:
    420/40 - 70/40 = 420 - 70/40 = 350/40
  5. After reducing the fraction, the answer is 35/4
  6. In mixed form: 83/4

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