Answers

Add 81/15 and 81/84

1^st number: 5 6/15, 2^nd number: 81/84

81/15 + 81/84 is 891/140.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 84 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 15 × 28 = 420,
   81/15 = 81 × 28/15 × 28 = 2268/420
3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
   81/84 = 81 × 5/84 × 5 = 405/420
4. Add the two like fractions:
   2268/420 + 405/420 = 2268 + 405/420 = 2673/420
5. 2673/420 simplified gives 891/140
6. So, 81/15 + 81/84 = 891/140
   In mixed form: 651/140

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