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Add 21/49 and 15/80

21/49 + 15/80 is 69/112.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 49 and 80 is 3920

    Next, find the equivalent fraction of both fractional numbers with denominator 3920
  2. For the 1st fraction, since 49 × 80 = 3920,
    21/49 = 21 × 80/49 × 80 = 1680/3920
  3. Likewise, for the 2nd fraction, since 80 × 49 = 3920,
    15/80 = 15 × 49/80 × 49 = 735/3920
  4. Add the two like fractions:
    1680/3920 + 735/3920 = 1680 + 735/3920 = 2415/3920
  5. 2415/3920 simplified gives 69/112
  6. So, 21/49 + 15/80 = 69/112

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