Answers

Add 15/36 and 81/40

1^st number: 15/36, 2^nd number: 2 1/40

15/36 + 81/40 is 293/120.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 36 and 40 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 36 × 10 = 360,
   15/36 = 15 × 10/36 × 10 = 150/360
3. Likewise, for the 2nd fraction, since 40 × 9 = 360,
   81/40 = 81 × 9/40 × 9 = 729/360
4. Add the two like fractions:
   150/360 + 729/360 = 150 + 729/360 = 879/360
5. 879/360 simplified gives 293/120
6. So, 15/36 + 81/40 = 293/120
   In mixed form: 253/120

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