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Add 70/40 and 21/28

1st number: 1 30/40, 2nd number: 21/28

70/40 + 21/28 is 5/2.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 28 is 280

    Next, find the equivalent fraction of both fractional numbers with denominator 280
  2. For the 1st fraction, since 40 × 7 = 280,
    70/40 = 70 × 7/40 × 7 = 490/280
  3. Likewise, for the 2nd fraction, since 28 × 10 = 280,
    21/28 = 21 × 10/28 × 10 = 210/280
  4. Add the two like fractions:
    490/280 + 210/280 = 490 + 210/280 = 700/280
  5. 700/280 simplified gives 5/2
  6. So, 70/40 + 21/28 = 5/2
    In mixed form: 21/2

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