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Add 21/2 and 90/40

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

21/2 + 90/40 is 51/4.

Steps for adding 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,
    90/40 = 90 × 1/40 × 1 = 90/40
  4. Add the two like fractions:
    420/40 + 90/40 = 420 + 90/40 = 510/40
  5. 510/40 simplified gives 51/4
  6. So, 21/2 + 90/40 = 51/4
    In mixed form: 123/4

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