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Add 30/35 and 21/63

30/35 + 21/63 is 25/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 35 and 63 is 315

    Next, find the equivalent fraction of both fractional numbers with denominator 315
  2. For the 1st fraction, since 35 × 9 = 315,
    30/35 = 30 × 9/35 × 9 = 270/315
  3. Likewise, for the 2nd fraction, since 63 × 5 = 315,
    21/63 = 21 × 5/63 × 5 = 105/315
  4. Add the two like fractions:
    270/315 + 105/315 = 270 + 105/315 = 375/315
  5. 375/315 simplified gives 25/21
  6. So, 30/35 + 21/63 = 25/21
    In mixed form: 14/21

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