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Add 1/40 and 21/18

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

1/40 + 21/18 is 143/120.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 18 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 40 × 9 = 360,
    1/40 = 1 × 9/40 × 9 = 9/360
  3. Likewise, for the 2nd fraction, since 18 × 20 = 360,
    21/18 = 21 × 20/18 × 20 = 420/360
  4. Add the two like fractions:
    9/360 + 420/360 = 9 + 420/360 = 429/360
  5. 429/360 simplified gives 143/120
  6. So, 1/40 + 21/18 = 143/120
    In mixed form: 123/120

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