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Add 54/21 and 20/40

1st number: 2 12/21, 2nd number: 20/40

54/21 + 20/40 is 43/14.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 40 is 840
  2. For the 1st fraction, since 21 × 40 = 840,
    54/21 = 54 × 40/21 × 40 = 2160/840
  3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
    20/40 = 20 × 21/40 × 21 = 420/840
  4. Add the two fractions:
    2160/840 + 420/840 = 2160 + 420/840 = 2580/840
  5. 2580/840 simplified gives 43/14
  6. So, 54/21 + 20/40 = 43/14
    In mixed form: 31/14

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