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Add 21/30 and 45/63

21/30 + 45/63 is 99/70.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 63 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 30 × 21 = 630,
    21/30 = 21 × 21/30 × 21 = 441/630
  3. Likewise, for the 2nd fraction, since 63 × 10 = 630,
    45/63 = 45 × 10/63 × 10 = 450/630
  4. Add the two like fractions:
    441/630 + 450/630 = 441 + 450/630 = 891/630
  5. 891/630 simplified gives 99/70
  6. So, 21/30 + 45/63 = 99/70
    In mixed form: 129/70

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