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Add 15/45 and 2/21

15/45 + 2/21 is 3/7.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 21 is 315

    Next, find the equivalent fraction of both fractional numbers with denominator 315
  2. For the 1st fraction, since 45 × 7 = 315,
    15/45 = 15 × 7/45 × 7 = 105/315
  3. Likewise, for the 2nd fraction, since 21 × 15 = 315,
    2/21 = 2 × 15/21 × 15 = 30/315
  4. Add the two like fractions:
    105/315 + 30/315 = 105 + 30/315 = 135/315
  5. 135/315 simplified gives 3/7
  6. So, 15/45 + 2/21 = 3/7

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