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Add 28/21 and 8/40

1st number: 1 7/21, 2nd number: 8/40

28/21 + 8/40 is 23/15.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 40 is 840

    Next, find the equivalent fraction of both fractional numbers with denominator 840
  2. For the 1st fraction, since 21 × 40 = 840,
    28/21 = 28 × 40/21 × 40 = 1120/840
  3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
    8/40 = 8 × 21/40 × 21 = 168/840
  4. Add the two like fractions:
    1120/840 + 168/840 = 1120 + 168/840 = 1288/840
  5. 1288/840 simplified gives 23/15
  6. So, 28/21 + 8/40 = 23/15
    In mixed form: 18/15

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