Add 70/28 and 56/21
1st number: 2 14/28, 2nd number: 2 14/21
70/28 + 56/21 is 31/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
70/28 = 70 × 3/28 × 3 = 210/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
56/21 = 56 × 4/21 × 4 = 224/84 - Add the two like fractions:
210/84 + 224/84 = 210 + 224/84 = 434/84 - 434/84 simplified gives 31/6
- So, 70/28 + 56/21 = 31/6
In mixed form: 51/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/56+56/21 70/28+56/42 70/84+56/21 70/28+56/63