Answers

Add 72/90 and 42/15

1^st number: 72/90, 2^nd number: 2 12/15

72/90 + 42/15 is 18/5.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 15 is 90
   
   Next, find the equivalent fraction of both fractional numbers with denominator 90
2. For the 1st fraction, since 90 × 1 = 90,
   72/90 = 72 × 1/90 × 1 = 72/90
3. Likewise, for the 2nd fraction, since 15 × 6 = 90,
   42/15 = 42 × 6/15 × 6 = 252/90
4. Add the two like fractions:
   72/90 + 252/90 = 72 + 252/90 = 324/90
5. 324/90 simplified gives 18/5
6. So, 72/90 + 42/15 = 18/5
   In mixed form: 33/5

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