Add 20/56 and 6/21
20/56 + 6/21 is 9/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 56 × 3 = 168,
20/56 = 20 × 3/56 × 3 = 60/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
6/21 = 6 × 8/21 × 8 = 48/168 - Add the two like fractions:
60/168 + 48/168 = 60 + 48/168 = 108/168 - 108/168 simplified gives 9/14
- So, 20/56 + 6/21 = 9/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/56+6/21 20/56+12/21 20/56+6/42 60/56+6/21 20/56+18/21 20/56+6/63 20/56+30/21 20/56+42/21