Answers

Add 90/15 and 72/40

1^st number: 6 0/15, 2^nd number: 1 32/40

90/15 + 72/40 is 39/5.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 40 is 120
   
   Next, find the equivalent fraction of both fractional numbers with denominator 120
2. For the 1st fraction, since 15 × 8 = 120,
   90/15 = 90 × 8/15 × 8 = 720/120
3. Likewise, for the 2nd fraction, since 40 × 3 = 120,
   72/40 = 72 × 3/40 × 3 = 216/120
4. Add the two like fractions:
   720/120 + 216/120 = 720 + 216/120 = 936/120
5. 936/120 simplified gives 39/5
6. So, 90/15 + 72/40 = 39/5
   In mixed form: 74/5

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