Answers

Add 72/30 and 70/80

1^st number: 2 12/30, 2^nd number: 70/80

72/30 + 70/80 is 131/40.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 80 is 240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 240
2. For the 1st fraction, since 30 × 8 = 240,
   72/30 = 72 × 8/30 × 8 = 576/240
3. Likewise, for the 2nd fraction, since 80 × 3 = 240,
   70/80 = 70 × 3/80 × 3 = 210/240
4. Add the two like fractions:
   576/240 + 210/240 = 576 + 210/240 = 786/240
5. 786/240 simplified gives 131/40
6. So, 72/30 + 70/80 = 131/40
   In mixed form: 311/40

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