Answers

Add 20/63 and 15/54

20/63 + 15/54 is 25/42.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 54 is 378
   
   Next, find the equivalent fraction of both fractional numbers with denominator 378
2. For the 1st fraction, since 63 × 6 = 378,
   20/63 = 20 × 6/63 × 6 = 120/378
3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
   15/54 = 15 × 7/54 × 7 = 105/378
4. Add the two like fractions:
   120/378 + 105/378 = 120 + 105/378 = 225/378
5. 225/378 simplified gives 25/42
6. So, 20/63 + 15/54 = 25/42

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