Answers

Add 18/63 and 54/84

18/63 + 54/84 is 13/14.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 84 is 252
   
   Next, find the equivalent fraction of both fractional numbers with denominator 252
2. For the 1st fraction, since 63 × 4 = 252,
   18/63 = 18 × 4/63 × 4 = 72/252
3. Likewise, for the 2nd fraction, since 84 × 3 = 252,
   54/84 = 54 × 3/84 × 3 = 162/252
4. Add the two like fractions:
   72/252 + 162/252 = 72 + 162/252 = 234/252
5. 234/252 simplified gives 13/14
6. So, 18/63 + 54/84 = 13/14

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad

Related: ³⁶/₆₃+⁵⁴/₈₄ ⁵⁴/₆₃+⁵⁴/₈₄ ⁹⁰/₆₃+⁵⁴/₈₄

Add Fractions Calculator