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Add 28/40 and 42/30

1st number: 28/40, 2nd number: 1 12/30

28/40 + 42/30 is 21/10.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 30 is 120

    Next, find the equivalent fraction of both fractional numbers with denominator 120
  2. For the 1st fraction, since 40 × 3 = 120,
    28/40 = 28 × 3/40 × 3 = 84/120
  3. Likewise, for the 2nd fraction, since 30 × 4 = 120,
    42/30 = 42 × 4/30 × 4 = 168/120
  4. Add the two like fractions:
    84/120 + 168/120 = 84 + 168/120 = 252/120
  5. 252/120 simplified gives 21/10
  6. So, 28/40 + 42/30 = 21/10
    In mixed form: 21/10

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