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Add 15/25 and 21/70

15/25 + 21/70 is 9/10.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 25 and 70 is 350

    Next, find the equivalent fraction of both fractional numbers with denominator 350
  2. For the 1st fraction, since 25 × 14 = 350,
    15/25 = 15 × 14/25 × 14 = 210/350
  3. Likewise, for the 2nd fraction, since 70 × 5 = 350,
    21/70 = 21 × 5/70 × 5 = 105/350
  4. Add the two like fractions:
    210/350 + 105/350 = 210 + 105/350 = 315/350
  5. 315/350 simplified gives 9/10
  6. So, 15/25 + 21/70 = 9/10

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