Add 8/21 and 56/8
1st number: 8/21, 2nd number: 7 0/8
8/21 + 56/8 is 155/21.
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,
8/21 = 8 × 8/21 × 8 = 64/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
56/8 = 56 × 21/8 × 21 = 1176/168 - Add the two like fractions:
64/168 + 1176/168 = 64 + 1176/168 = 1240/168 - 1240/168 simplified gives 155/21
- So, 8/21 + 56/8 = 155/21
In mixed form: 78/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/21+56/8 8/42+56/8 8/21+56/16 24/21+56/8 8/63+56/8 8/21+56/24 40/21+56/8 8/21+56/40 56/21+56/8