Add 5/28 and 25/21
1st number: 5/28, 2nd number: 1 4/21
5/28 + 25/21 is 115/84.
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,
25/21 = 25 × 4/21 × 4 = 100/84 - Add the two like fractions:
15/84 + 100/84 = 15 + 100/84 = 115/84 - So, 5/28 + 25/21 = 115/84
In mixed form: 131/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/28+25/21 5/28+50/21 5/56+25/21 5/28+25/42 15/28+25/21 5/28+75/21 5/84+25/21 5/28+25/63 25/28+25/21 35/28+25/21