Answers

Add 72/80 and 42/40

1^st number: 72/80, 2^nd number: 1 2/40

72/80 + 42/40 is 39/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 40 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 80 × 1 = 80,
   72/80 = 72 × 1/80 × 1 = 72/80
3. Likewise, for the 2nd fraction, since 40 × 2 = 80,
   42/40 = 42 × 2/40 × 2 = 84/80
4. Add the two like fractions:
   72/80 + 84/80 = 72 + 84/80 = 156/80
5. 156/80 simplified gives 39/20
6. So, 72/80 + 42/40 = 39/20
   In mixed form: 119/20

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