Answers

Add 72/7 and 84/40

1^st number: 10 2/7, 2^nd number: 2 4/40

72/7 + 84/40 is 867/70.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 7 and 40 is 280
   
   Next, find the equivalent fraction of both fractional numbers with denominator 280
2. For the 1st fraction, since 7 × 40 = 280,
   72/7 = 72 × 40/7 × 40 = 2880/280
3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
   84/40 = 84 × 7/40 × 7 = 588/280
4. Add the two like fractions:
   2880/280 + 588/280 = 2880 + 588/280 = 3468/280
5. 3468/280 simplified gives 867/70
6. So, 72/7 + 84/40 = 867/70
   In mixed form: 1227/70

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