Answers

Add 18/63 and 42/20

1^st number: 18/63, 2^nd number: 2 2/20

18/63 + 42/20 is 167/70.

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,
   18/63 = 18 × 20/63 × 20 = 360/1260
3. Likewise, for the 2nd fraction, since 20 × 63 = 1260,
   42/20 = 42 × 63/20 × 63 = 2646/1260
4. Add the two like fractions:
   360/1260 + 2646/1260 = 360 + 2646/1260 = 3006/1260
5. 3006/1260 simplified gives 167/70
6. So, 18/63 + 42/20 = 167/70
   In mixed form: 227/70

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