Add 9/21 and 25/28
9/21 + 25/28 is 37/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
9/21 = 9 × 4/21 × 4 = 36/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
25/28 = 25 × 3/28 × 3 = 75/84 - Add the two like fractions:
36/84 + 75/84 = 36 + 75/84 = 111/84 - 111/84 simplified gives 37/28
- So, 9/21 + 25/28 = 37/28
In mixed form: 19/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/21+25/28 9/21+50/28 9/42+25/28 9/21+25/56 27/21+25/28 9/21+75/28 9/63+25/28 9/21+25/84 45/21+25/28 63/21+25/28