Answers

Add 72/40 and 36/15

1^st number: 1 32/40, 2^nd number: 2 6/15

72/40 + 36/15 is 21/5.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 15 is 120
   
   Next, find the equivalent fraction of both fractional numbers with denominator 120
2. For the 1st fraction, since 40 × 3 = 120,
   72/40 = 72 × 3/40 × 3 = 216/120
3. Likewise, for the 2nd fraction, since 15 × 8 = 120,
   36/15 = 36 × 8/15 × 8 = 288/120
4. Add the two like fractions:
   216/120 + 288/120 = 216 + 288/120 = 504/120
5. 504/120 simplified gives 21/5
6. So, 72/40 + 36/15 = 21/5
   In mixed form: 41/5

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