Answers

Add 20/63 and 20/72

20/63 + 20/72 is 25/42.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 72 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 63 × 8 = 504,
   20/63 = 20 × 8/63 × 8 = 160/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   20/72 = 20 × 7/72 × 7 = 140/504
4. Add the two like fractions:
   160/504 + 140/504 = 160 + 140/504 = 300/504
5. 300/504 simplified gives 25/42
6. So, 20/63 + 20/72 = 25/42

MathStep (Works offline)

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

Related: ⁴⁰/₆₃+²⁰/₇₂ ²⁰/₆₃+⁴⁰/₇₂ ⁶⁰/₆₃+²⁰/₇₂ ²⁰/₆₃+⁶⁰/₇₂

Add Fractions Calculator