Answers

Add 54/63 and 28/20

1^st number: 54/63, 2^nd number: 1 8/20

54/63 + 28/20 is 79/35.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 20 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 63 × 20 = 1260,
   54/63 = 54 × 20/63 × 20 = 1080/1260
3. Likewise, for the 2nd fraction, since 20 × 63 = 1260,
   28/20 = 28 × 63/20 × 63 = 1764/1260
4. Add the two like fractions:
   1080/1260 + 1764/1260 = 1080 + 1764/1260 = 2844/1260
5. 2844/1260 simplified gives 79/35
6. So, 54/63 + 28/20 = 79/35
   In mixed form: 29/35

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