Add 25/28 and 5/21
25/28 + 5/21 is 95/84.
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,
25/28 = 25 × 3/28 × 3 = 75/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
5/21 = 5 × 4/21 × 4 = 20/84 - Add the two like fractions:
75/84 + 20/84 = 75 + 20/84 = 95/84 - So, 25/28 + 5/21 = 95/84
In mixed form: 111/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/28+5/21 25/28+10/21 25/56+5/21 25/28+5/42 75/28+5/21 25/28+15/21 25/84+5/21 25/28+5/63 25/28+25/21 25/28+35/21