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Add 42/75 and 21/25

42/75 + 21/25 is 7/5.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 75 and 25 is 75

    Next, find the equivalent fraction of both fractional numbers with denominator 75
  2. For the 1st fraction, since 75 × 1 = 75,
    42/75 = 42 × 1/75 × 1 = 42/75
  3. Likewise, for the 2nd fraction, since 25 × 3 = 75,
    21/25 = 21 × 3/25 × 3 = 63/75
  4. Add the two like fractions:
    42/75 + 63/75 = 42 + 63/75 = 105/75
  5. 105/75 simplified gives 7/5
  6. So, 42/75 + 21/25 = 7/5
    In mixed form: 12/5

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