Add 5/28 and 7/21
5/28 + 7/21 is 43/84.
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,
5/28 = 5 × 3/28 × 3 = 15/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
7/21 = 7 × 4/21 × 4 = 28/84 - Add the two like fractions:
15/84 + 28/84 = 15 + 28/84 = 43/84 - So, 5/28 + 7/21 = 43/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/28+7/21 5/28+14/21 5/56+7/21 5/28+7/42 15/28+7/21 5/84+7/21 5/28+7/63 25/28+7/21 5/28+35/21 35/28+7/21 5/28+49/21