Add 20/21 and 56/8
1st number: 20/21, 2nd number: 7 0/8
20/21 + 56/8 is 167/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
20/21 = 20 × 8/21 × 8 = 160/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
56/8 = 56 × 21/8 × 21 = 1176/168 - Add the two like fractions:
160/168 + 1176/168 = 160 + 1176/168 = 1336/168 - 1336/168 simplified gives 167/21
- So, 20/21 + 56/8 = 167/21
In mixed form: 720/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21+56/8 20/42+56/8 20/21+56/16 60/21+56/8 20/63+56/8 20/21+56/24 20/21+56/40