Add 63/9 and 42/20
1st number: 7 0/9, 2nd number: 2 2/20
63/9 + 42/20 is 91/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 9 × 20 = 180,
63/9 = 63 × 20/9 × 20 = 1260/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
42/20 = 42 × 9/20 × 9 = 378/180 - Add the two like fractions:
1260/180 + 378/180 = 1260 + 378/180 = 1638/180 - 1638/180 simplified gives 91/10
- So, 63/9 + 42/20 = 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: 63/9+84/20 63/18+42/20 63/9+42/40 63/27+42/20 63/9+42/60 63/45+42/20