Add 6/20 and 21/28
6/20 + 21/28 is 21/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
6/20 = 6 × 7/20 × 7 = 42/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
21/28 = 21 × 5/28 × 5 = 105/140 - Add the two like fractions:
42/140 + 105/140 = 42 + 105/140 = 147/140 - 147/140 simplified gives 21/20
- So, 6/20 + 21/28 = 21/20
In mixed form: 11/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/20+21/28 6/20+42/28 6/40+21/28 6/20+21/56 18/20+21/28 6/20+63/28 6/60+21/28 6/20+21/84 30/20+21/28 42/20+21/28