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Add 15/25 and 9/42

15/25 + 9/42 is 57/70.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 25 and 42 is 1050

    Next, find the equivalent fraction of both fractional numbers with denominator 1050
  2. For the 1st fraction, since 25 × 42 = 1050,
    15/25 = 15 × 42/25 × 42 = 630/1050
  3. Likewise, for the 2nd fraction, since 42 × 25 = 1050,
    9/42 = 9 × 25/42 × 25 = 225/1050
  4. Add the two like fractions:
    630/1050 + 225/1050 = 630 + 225/1050 = 855/1050
  5. 855/1050 simplified gives 57/70
  6. So, 15/25 + 9/42 = 57/70

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