Answers

Add 72/20 and 84/16

1^st number: 3 12/20, 2^nd number: 5 4/16

72/20 + 84/16 is 177/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 16 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 20 × 4 = 80,
   72/20 = 72 × 4/20 × 4 = 288/80
3. Likewise, for the 2nd fraction, since 16 × 5 = 80,
   84/16 = 84 × 5/16 × 5 = 420/80
4. Add the two like fractions:
   288/80 + 420/80 = 288 + 420/80 = 708/80
5. 708/80 simplified gives 177/20
6. So, 72/20 + 84/16 = 177/20
   In mixed form: 817/20

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