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Add 18/63 and 20/40

18/63 + 20/40 is 11/14.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 63 and 40 is 2520
  2. For the 1st fraction, since 63 × 40 = 2520,
    18/63 = 18 × 40/63 × 40 = 720/2520
  3. Likewise, for the 2nd fraction, since 40 × 63 = 2520,
    20/40 = 20 × 63/40 × 63 = 1260/2520
  4. Add the two fractions:
    720/2520 + 1260/2520 = 720 + 1260/2520 = 1980/2520
  5. 1980/2520 simplified gives 11/14
  6. So, 18/63 + 20/40 = 11/14

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