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Add 15/80 and 40/70

15/80 + 40/70 is 85/112.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 70 is 560
  2. For the 1st fraction, since 80 × 7 = 560,
    15/80 = 15 × 7/80 × 7 = 105/560
  3. Likewise, for the 2nd fraction, since 70 × 8 = 560,
    40/70 = 40 × 8/70 × 8 = 320/560
  4. Add the two fractions:
    105/560 + 320/560 = 105 + 320/560 = 425/560
  5. 425/560 simplified gives 85/112
  6. So, 15/80 + 40/70 = 85/112

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