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Add 25/70 and 21/90

25/70 + 21/90 is 62/105.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 90 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 70 × 9 = 630,
    25/70 = 25 × 9/70 × 9 = 225/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    21/90 = 21 × 7/90 × 7 = 147/630
  4. Add the two like fractions:
    225/630 + 147/630 = 225 + 147/630 = 372/630
  5. 372/630 simplified gives 62/105
  6. So, 25/70 + 21/90 = 62/105

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