Answers

Add 56/15 and 21/80

1^st number: 3 11/15, 2^nd number: 21/80

56/15 + 21/80 is 959/240.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 80 is 240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 240
2. For the 1st fraction, since 15 × 16 = 240,
   56/15 = 56 × 16/15 × 16 = 896/240
3. Likewise, for the 2nd fraction, since 80 × 3 = 240,
   21/80 = 21 × 3/80 × 3 = 63/240
4. Add the two like fractions:
   896/240 + 63/240 = 896 + 63/240 = 959/240
5. So, 56/15 + 21/80 = 959/240
   In mixed form: 3239/240

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