Answers

Add 90/72 and 15/20

1^st number: 1 18/72, 2^nd number: 15/20

90/72 + 15/20 is 2/1.

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,
   90/72 = 90 × 5/72 × 5 = 450/360
3. Likewise, for the 2nd fraction, since 20 × 18 = 360,
   15/20 = 15 × 18/20 × 18 = 270/360
4. Add the two like fractions:
   450/360 + 270/360 = 450 + 270/360 = 720/360
5. 720/360 simplified gives 2/1
6. So, 90/72 + 15/20 = 2/1

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