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Add 27/40 and 70/21

1st number: 27/40, 2nd number: 3 7/21

27/40 + 70/21 is 481/120.

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,
    27/40 = 27 × 21/40 × 21 = 567/840
  3. Likewise, for the 2nd fraction, since 21 × 40 = 840,
    70/21 = 70 × 40/21 × 40 = 2800/840
  4. Add the two like fractions:
    567/840 + 2800/840 = 567 + 2800/840 = 3367/840
  5. 3367/840 simplified gives 481/120
  6. So, 27/40 + 70/21 = 481/120
    In mixed form: 41/120

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