Answers

Add 42/60 and 20/63

42/60 + 20/63 is 641/630.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 60 and 63 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 60 × 21 = 1260,
   42/60 = 42 × 21/60 × 21 = 882/1260
3. Likewise, for the 2nd fraction, since 63 × 20 = 1260,
   20/63 = 20 × 20/63 × 20 = 400/1260
4. Add the two like fractions:
   882/1260 + 400/1260 = 882 + 400/1260 = 1282/1260
5. 1282/1260 simplified gives 641/630
6. So, 42/60 + 20/63 = 641/630
   In mixed form: 111/630

MathStep (Works offline)

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

Related: ⁸⁴/₆₀+²⁰/₆₃ ⁴²/₆₀+⁴⁰/₆₃ ⁴²/₆₀+⁶⁰/₆₃

Add Fractions Calculator