Answers

Add 72/36 and 4/80

1^st number: 2 0/36, 2^nd number: 4/80

72/36 + 4/80 is 41/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 36 and 80 is 720
   
   Next, find the equivalent fraction of both fractional numbers with denominator 720
2. For the 1st fraction, since 36 × 20 = 720,
   72/36 = 72 × 20/36 × 20 = 1440/720
3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
   4/80 = 4 × 9/80 × 9 = 36/720
4. Add the two like fractions:
   1440/720 + 36/720 = 1440 + 36/720 = 1476/720
5. 1476/720 simplified gives 41/20
6. So, 72/36 + 4/80 = 41/20
   In mixed form: 21/20

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