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Add 4/45 and 21/63

4/45 + 21/63 is 19/45.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 63 is 315

    Next, find the equivalent fraction of both fractional numbers with denominator 315
  2. For the 1st fraction, since 45 × 7 = 315,
    4/45 = 4 × 7/45 × 7 = 28/315
  3. Likewise, for the 2nd fraction, since 63 × 5 = 315,
    21/63 = 21 × 5/63 × 5 = 105/315
  4. Add the two like fractions:
    28/315 + 105/315 = 28 + 105/315 = 133/315
  5. 133/315 simplified gives 19/45
  6. So, 4/45 + 21/63 = 19/45

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