Answers

Add 64/5 and 90/72

1^st number: 12 4/5, 2^nd number: 1 18/72

64/5 + 90/72 is 281/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 5 and 72 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 5 × 72 = 360,
   64/5 = 64 × 72/5 × 72 = 4608/360
3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
   90/72 = 90 × 5/72 × 5 = 450/360
4. Add the two like fractions:
   4608/360 + 450/360 = 4608 + 450/360 = 5058/360
5. 5058/360 simplified gives 281/20
6. So, 64/5 + 90/72 = 281/20
   In mixed form: 141/20

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