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Add 10/25 and 42/90

10/25 + 42/90 is 13/15.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 25 and 90 is 450
  2. For the 1st fraction, since 25 × 18 = 450,
    10/25 = 10 × 18/25 × 18 = 180/450
  3. Likewise, for the 2nd fraction, since 90 × 5 = 450,
    42/90 = 42 × 5/90 × 5 = 210/450
  4. Add the two fractions:
    180/450 + 210/450 = 180 + 210/450 = 390/450
  5. After reducing the fraction, the answer is 13/15

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