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Add 2/7 and 21/45

2/7 + 21/45 is 79/105.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 45 is 315

    Next, find the equivalent fraction of both fractional numbers with denominator 315
  2. For the 1st fraction, since 7 × 45 = 315,
    2/7 = 2 × 45/7 × 45 = 90/315
  3. Likewise, for the 2nd fraction, since 45 × 7 = 315,
    21/45 = 21 × 7/45 × 7 = 147/315
  4. Add the two like fractions:
    90/315 + 147/315 = 90 + 147/315 = 237/315
  5. 237/315 simplified gives 79/105
  6. So, 2/7 + 21/45 = 79/105

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