Add 42/20 and 63/9
1st number: 2 2/20, 2nd number: 7 0/9
42/20 + 63/9 is 91/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 9 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
42/20 = 42 × 9/20 × 9 = 378/180 - Likewise, for the 2nd fraction, since 9 × 20 = 180,
63/9 = 63 × 20/9 × 20 = 1260/180 - Add the two like fractions:
378/180 + 1260/180 = 378 + 1260/180 = 1638/180 - 1638/180 simplified gives 91/10
- So, 42/20 + 63/9 = 91/10
In mixed form: 91/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/20+63/9 42/40+63/9 42/20+63/18 42/60+63/9 42/20+63/27 42/20+63/45