Answers

Add 81/15 and 81/72

1^st number: 5 6/15, 2^nd number: 1 9/72

81/15 + 81/72 is 261/40.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 72 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 15 × 24 = 360,
   81/15 = 81 × 24/15 × 24 = 1944/360
3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
   81/72 = 81 × 5/72 × 5 = 405/360
4. Add the two like fractions:
   1944/360 + 405/360 = 1944 + 405/360 = 2349/360
5. 2349/360 simplified gives 261/40
6. So, 81/15 + 81/72 = 261/40
   In mixed form: 621/40

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