Answers

Add 90/72 and 50/15

1^st number: 1 18/72, 2^nd number: 3 5/15

90/72 + 50/15 is 55/12.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 15 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 15 × 24 = 360,
   50/15 = 50 × 24/15 × 24 = 1200/360
4. Add the two like fractions:
   450/360 + 1200/360 = 450 + 1200/360 = 1650/360
5. 1650/360 simplified gives 55/12
6. So, 90/72 + 50/15 = 55/12
   In mixed form: 47/12

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