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Add 15/84 and 9/80

15/84 + 9/80 is 163/560.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 80 is 1680
  2. For the 1st fraction, since 84 × 20 = 1680,
    15/84 = 15 × 20/84 × 20 = 300/1680
  3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
    9/80 = 9 × 21/80 × 21 = 189/1680
  4. Add the two fractions:
    300/1680 + 189/1680 = 300 + 189/1680 = 489/1680
  5. 489/1680 simplified gives 163/560
  6. So, 15/84 + 9/80 = 163/560

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