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Add 21/40 and 15/36

21/40 + 15/36 is 113/120.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 36 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 40 × 9 = 360,
    21/40 = 21 × 9/40 × 9 = 189/360
  3. Likewise, for the 2nd fraction, since 36 × 10 = 360,
    15/36 = 15 × 10/36 × 10 = 150/360
  4. Add the two like fractions:
    189/360 + 150/360 = 189 + 150/360 = 339/360
  5. 339/360 simplified gives 113/120
  6. So, 21/40 + 15/36 = 113/120

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