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Add 40/5 and 7/21

1st number: 8 0/5, 2nd number: 7/21

40/5 + 7/21 is 25/3.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 21 is 105

    Next, find the equivalent fraction of both fractional numbers with denominator 105
  2. For the 1st fraction, since 5 × 21 = 105,
    40/5 = 40 × 21/5 × 21 = 840/105
  3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
    7/21 = 7 × 5/21 × 5 = 35/105
  4. Add the two like fractions:
    840/105 + 35/105 = 840 + 35/105 = 875/105
  5. 875/105 simplified gives 25/3
  6. So, 40/5 + 7/21 = 25/3
    In mixed form: 81/3

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