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Add 21/18 and 30/40

1st number: 1 3/18, 2nd number: 30/40

21/18 + 30/40 is 23/12.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 40 is 360
  2. For the 1st fraction, since 18 × 20 = 360,
    21/18 = 21 × 20/18 × 20 = 420/360
  3. Likewise, for the 2nd fraction, since 40 × 9 = 360,
    30/40 = 30 × 9/40 × 9 = 270/360
  4. Add the two fractions:
    420/360 + 270/360 = 420 + 270/360 = 690/360
  5. 690/360 simplified gives 23/12
  6. So, 21/18 + 30/40 = 23/12
    In mixed form: 111/12

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