Answers

Add 81/45 and 54/84

1^st number: 1 36/45, 2^nd number: 54/84

81/45 + 54/84 is 171/70.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 84 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 45 × 28 = 1260,
   81/45 = 81 × 28/45 × 28 = 2268/1260
3. Likewise, for the 2nd fraction, since 84 × 15 = 1260,
   54/84 = 54 × 15/84 × 15 = 810/1260
4. Add the two like fractions:
   2268/1260 + 810/1260 = 2268 + 810/1260 = 3078/1260
5. 3078/1260 simplified gives 171/70
6. So, 81/45 + 54/84 = 171/70
   In mixed form: 231/70

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