Answers

Add 21/84 and 54/45

1^st number: 21/84, 2^nd number: 1 9/45

21/84 + 54/45 is 29/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 45 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 84 × 15 = 1260,
   21/84 = 21 × 15/84 × 15 = 315/1260
3. Likewise, for the 2nd fraction, since 45 × 28 = 1260,
   54/45 = 54 × 28/45 × 28 = 1512/1260
4. Add the two like fractions:
   315/1260 + 1512/1260 = 315 + 1512/1260 = 1827/1260
5. 1827/1260 simplified gives 29/20
6. So, 21/84 + 54/45 = 29/20
   In mixed form: 19/20

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