Answers

Add 72/40 and 45/80

1^st number: 1 32/40, 2^nd number: 45/80

72/40 + 45/80 is 189/80.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 80 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 40 × 2 = 80,
   72/40 = 72 × 2/40 × 2 = 144/80
3. Likewise, for the 2nd fraction, since 80 × 1 = 80,
   45/80 = 45 × 1/80 × 1 = 45/80
4. Add the two like fractions:
   144/80 + 45/80 = 144 + 45/80 = 189/80
5. So, 72/40 + 45/80 = 189/80
   In mixed form: 229/80

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