Answers

Add 20/63 and 10/42

20/63 + 10/42 is 5/9.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 42 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 63 × 2 = 126,
   20/63 = 20 × 2/63 × 2 = 40/126
3. Likewise, for the 2nd fraction, since 42 × 3 = 126,
   10/42 = 10 × 3/42 × 3 = 30/126
4. Add the two like fractions:
   40/126 + 30/126 = 40 + 30/126 = 70/126
5. 70/126 simplified gives 5/9
6. So, 20/63 + 10/42 = 5/9

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