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Add 12/40 and 36/21

1st number: 12/40, 2nd number: 1 15/21

12/40 + 36/21 is 141/70.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 840
  2. For the 1st fraction, since 40 × 21 = 840,
    12/40 = 12 × 21/40 × 21 = 252/840
  3. Likewise, for the 2nd fraction, since 21 × 40 = 840,
    36/21 = 36 × 40/21 × 40 = 1440/840
  4. Add the two like fractions:
    252/840 + 1440/840 = 252 + 1440/840 = 1692/840
  5. 1692/840 simplified gives 141/70
  6. So, 12/40 + 36/21 = 141/70
    In mixed form: 21/70

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