Add 64/20 and 21/9
1st number: 3 4/20, 2nd number: 2 3/9
64/20 + 21/9 is 83/15.
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,
64/20 = 64 × 9/20 × 9 = 576/180 - Likewise, for the 2nd fraction, since 9 × 20 = 180,
21/9 = 21 × 20/9 × 20 = 420/180 - Add the two like fractions:
576/180 + 420/180 = 576 + 420/180 = 996/180 - 996/180 simplified gives 83/15
- So, 64/20 + 21/9 = 83/15
In mixed form: 58/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 64/20+42/9 64/40+21/9 64/20+21/18 64/20+63/9 64/60+21/9 64/20+21/27 64/20+21/45 64/20+21/63