Answers

Add 18/63 and 64/80

18/63 + 64/80 is 38/35.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 80 is 5040
   
   Next, find the equivalent fraction of both fractional numbers with denominator 5040
2. For the 1st fraction, since 63 × 80 = 5040,
   18/63 = 18 × 80/63 × 80 = 1440/5040
3. Likewise, for the 2nd fraction, since 80 × 63 = 5040,
   64/80 = 64 × 63/80 × 63 = 4032/5040
4. Add the two like fractions:
   1440/5040 + 4032/5040 = 1440 + 4032/5040 = 5472/5040
5. 5472/5040 simplified gives 38/35
6. So, 18/63 + 64/80 = 38/35
   In mixed form: 13/35

MathStep (Works offline)

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

Related: ³⁶/₆₃+⁶⁴/₈₀ ⁵⁴/₆₃+⁶⁴/₈₀ ⁹⁰/₆₃+⁶⁴/₈₀

Add Fractions Calculator