Answers

Add 72/45 and 48/80

1^st number: 1 27/45, 2^nd number: 48/80

72/45 + 48/80 is 11/5.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 80 is 720
   
   Next, find the equivalent fraction of both fractional numbers with denominator 720
2. For the 1st fraction, since 45 × 16 = 720,
   72/45 = 72 × 16/45 × 16 = 1152/720
3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
   48/80 = 48 × 9/80 × 9 = 432/720
4. Add the two like fractions:
   1152/720 + 432/720 = 1152 + 432/720 = 1584/720
5. 1584/720 simplified gives 11/5
6. So, 72/45 + 48/80 = 11/5
   In mixed form: 21/5

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