Answers

Add 84/64 and 9/15

1^st number: 1 20/64, 2^nd number: 9/15

84/64 + 9/15 is 153/80.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 64 and 15 is 960
   
   Next, find the equivalent fraction of both fractional numbers with denominator 960
2. For the 1st fraction, since 64 × 15 = 960,
   84/64 = 84 × 15/64 × 15 = 1260/960
3. Likewise, for the 2nd fraction, since 15 × 64 = 960,
   9/15 = 9 × 64/15 × 64 = 576/960
4. Add the two like fractions:
   1260/960 + 576/960 = 1260 + 576/960 = 1836/960
5. 1836/960 simplified gives 153/80
6. So, 84/64 + 9/15 = 153/80
   In mixed form: 173/80

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