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Add 40/21 and 28/40

1st number: 1 19/21, 2nd number: 28/40

40/21 + 28/40 is 547/210.

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,
    40/21 = 40 × 40/21 × 40 = 1600/840
  3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
    28/40 = 28 × 21/40 × 21 = 588/840
  4. Add the two like fractions:
    1600/840 + 588/840 = 1600 + 588/840 = 2188/840
  5. 2188/840 simplified gives 547/210
  6. So, 40/21 + 28/40 = 547/210
    In mixed form: 2127/210

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