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Add 10/40 and 18/45

10/40 + 18/45 is 13/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 45 is 360
  2. For the 1st fraction, since 40 × 9 = 360,
    10/40 = 10 × 9/40 × 9 = 90/360
  3. Likewise, for the 2nd fraction, since 45 × 8 = 360,
    18/45 = 18 × 8/45 × 8 = 144/360
  4. Add the two fractions:
    90/360 + 144/360 = 90 + 144/360 = 234/360
  5. After reducing the fraction, the answer is 13/20

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