Add 8/21 and 70/56
1st number: 8/21, 2nd number: 1 14/56
8/21 + 70/56 is 137/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 56 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 56 × 3 = 168,
70/56 = 70 × 3/56 × 3 = 210/168 - Add the two like fractions:
64/168 + 210/168 = 64 + 210/168 = 274/168 - 274/168 simplified gives 137/84
- So, 8/21 + 70/56 = 137/84
In mixed form: 153/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/21+70/56 8/42+70/56 24/21+70/56 8/63+70/56 40/21+70/56 56/21+70/56