Answers

Add 80/72 and 42/20

1^st number: 1 8/72, 2^nd number: 2 2/20

80/72 + 42/20 is 289/90.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 20 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 72 × 5 = 360,
   80/72 = 80 × 5/72 × 5 = 400/360
3. Likewise, for the 2nd fraction, since 20 × 18 = 360,
   42/20 = 42 × 18/20 × 18 = 756/360
4. Add the two like fractions:
   400/360 + 756/360 = 400 + 756/360 = 1156/360
5. 1156/360 simplified gives 289/90
6. So, 80/72 + 42/20 = 289/90
   In mixed form: 319/90

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