Answers

Add 70/60 and 72/80

1^st number: 1 10/60, 2^nd number: 72/80

70/60 + 72/80 is 31/15.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 60 and 80 is 240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 240
2. For the 1st fraction, since 60 × 4 = 240,
   70/60 = 70 × 4/60 × 4 = 280/240
3. Likewise, for the 2nd fraction, since 80 × 3 = 240,
   72/80 = 72 × 3/80 × 3 = 216/240
4. Add the two like fractions:
   280/240 + 216/240 = 280 + 216/240 = 496/240
5. 496/240 simplified gives 31/15
6. So, 70/60 + 72/80 = 31/15
   In mixed form: 21/15

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