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Add 3/7 and 21/45

3/7 + 21/45 is 94/105.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 45 is 315
  2. For the 1st fraction, since 7 × 45 = 315,
    3/7 = 3 × 45/7 × 45 = 135/315
  3. Likewise, for the 2nd fraction, since 45 × 7 = 315,
    21/45 = 21 × 7/45 × 7 = 147/315
  4. Add the two fractions:
    135/315 + 147/315 = 135 + 147/315 = 282/315
  5. After reducing the fraction, the answer is 94/105

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