Answers

Add 90/72 and 72/30

1^st number: 1 18/72, 2^nd number: 2 12/30

90/72 + 72/30 is 73/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 30 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 72 × 5 = 360,
   90/72 = 90 × 5/72 × 5 = 450/360
3. Likewise, for the 2nd fraction, since 30 × 12 = 360,
   72/30 = 72 × 12/30 × 12 = 864/360
4. Add the two like fractions:
   450/360 + 864/360 = 450 + 864/360 = 1314/360
5. 1314/360 simplified gives 73/20
6. So, 90/72 + 72/30 = 73/20
   In mixed form: 313/20

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