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Add 21/15 and 9/16

1st number: 1 6/15, 2nd number: 9/16

21/15 + 9/16 is 157/80.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 16 is 240

    Next, find the equivalent fraction of both fractional numbers with denominator 240
  2. For the 1st fraction, since 15 × 16 = 240,
    21/15 = 21 × 16/15 × 16 = 336/240
  3. Likewise, for the 2nd fraction, since 16 × 15 = 240,
    9/16 = 9 × 15/16 × 15 = 135/240
  4. Add the two like fractions:
    336/240 + 135/240 = 336 + 135/240 = 471/240
  5. 471/240 simplified gives 157/80
  6. So, 21/15 + 9/16 = 157/80
    In mixed form: 177/80

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