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Add 10/45 and 21/63

10/45 + 21/63 is 5/9.

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,
    10/45 = 10 × 7/45 × 7 = 70/315
  3. Likewise, for the 2nd fraction, since 63 × 5 = 315,
    21/63 = 21 × 5/63 × 5 = 105/315
  4. Add the two fractions:
    70/315 + 105/315 = 70 + 105/315 = 175/315
  5. After reducing the fraction, the answer is 5/9

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