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Add 40/15 and 21/84

1st number: 2 10/15, 2nd number: 21/84

40/15 + 21/84 is 35/12.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 84 is 420
  2. For the 1st fraction, since 15 × 28 = 420,
    40/15 = 40 × 28/15 × 28 = 1120/420
  3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
    21/84 = 21 × 5/84 × 5 = 105/420
  4. Add the two fractions:
    1120/420 + 105/420 = 1120 + 105/420 = 1225/420
  5. 1225/420 simplified gives 35/12
  6. So, 40/15 + 21/84 = 35/12
    In mixed form: 211/12

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