Answers

Add 72/15 and 60/80

1^st number: 4 12/15, 2^nd number: 60/80

72/15 + 60/80 is 111/20.

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,
   72/15 = 72 × 16/15 × 16 = 1152/240
3. Likewise, for the 2nd fraction, since 80 × 3 = 240,
   60/80 = 60 × 3/80 × 3 = 180/240
4. Add the two like fractions:
   1152/240 + 180/240 = 1152 + 180/240 = 1332/240
5. 1332/240 simplified gives 111/20
6. So, 72/15 + 60/80 = 111/20
   In mixed form: 511/20

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