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Add 21/45 and 10/63

21/45 + 10/63 is 197/315.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 63 is 315
  2. For the 1st fraction, since 45 × 7 = 315,
    21/45 = 21 × 7/45 × 7 = 147/315
  3. Likewise, for the 2nd fraction, since 63 × 5 = 315,
    10/63 = 10 × 5/63 × 5 = 50/315
  4. Add the two fractions:
    147/315 + 50/315 = 147 + 50/315 = 197/315

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