Add 3/21 and 56/8
1st number: 3/21, 2nd number: 7 0/8
3/21 + 56/8 is 50/7.
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,
3/21 = 3 × 8/21 × 8 = 24/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
56/8 = 56 × 21/8 × 21 = 1176/168 - Add the two like fractions:
24/168 + 1176/168 = 24 + 1176/168 = 1200/168 - 1200/168 simplified gives 50/7
- So, 3/21 + 56/8 = 50/7
In mixed form: 71/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/21+56/8 3/42+56/8 3/21+56/16 9/21+56/8 3/63+56/8 3/21+56/24 15/21+56/8 3/21+56/40