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Add 21/40 and 36/30

1st number: 21/40, 2nd number: 1 6/30

21/40 + 36/30 is 69/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 30 is 120

    Next, find the equivalent fraction of both fractional numbers with denominator 120
  2. For the 1st fraction, since 40 × 3 = 120,
    21/40 = 21 × 3/40 × 3 = 63/120
  3. Likewise, for the 2nd fraction, since 30 × 4 = 120,
    36/30 = 36 × 4/30 × 4 = 144/120
  4. Add the two like fractions:
    63/120 + 144/120 = 63 + 144/120 = 207/120
  5. 207/120 simplified gives 69/40
  6. So, 21/40 + 36/30 = 69/40
    In mixed form: 129/40

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