Add 20/8 and 21/56
1st number: 2 4/8, 2nd number: 21/56
20/8 + 21/56 is 23/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 56 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 8 × 7 = 56,
20/8 = 20 × 7/8 × 7 = 140/56 - Likewise, for the 2nd fraction, since 56 × 1 = 56,
21/56 = 21 × 1/56 × 1 = 21/56 - Add the two like fractions:
140/56 + 21/56 = 140 + 21/56 = 161/56 - 161/56 simplified gives 23/8
- So, 20/8 + 21/56 = 23/8
In mixed form: 27/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/8+21/56 20/8+42/56 20/16+21/56 60/8+21/56 20/8+63/56 20/24+21/56 20/40+21/56 20/56+21/56