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Add 21/70 and 15/16

21/70 + 15/16 is 99/80.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 16 is 560
  2. For the 1st fraction, since 70 × 8 = 560,
    21/70 = 21 × 8/70 × 8 = 168/560
  3. Likewise, for the 2nd fraction, since 16 × 35 = 560,
    15/16 = 15 × 35/16 × 35 = 525/560
  4. Add the two fractions:
    168/560 + 525/560 = 168 + 525/560 = 693/560
  5. After reducing the fraction, the answer is 99/80
  6. In mixed form: 119/80

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