Add 21/24 and 25/28
21/24 + 25/28 is 99/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 28 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 24 × 7 = 168,
21/24 = 21 × 7/24 × 7 = 147/168 - Likewise, for the 2nd fraction, since 28 × 6 = 168,
25/28 = 25 × 6/28 × 6 = 150/168 - Add the two like fractions:
147/168 + 150/168 = 147 + 150/168 = 297/168 - 297/168 simplified gives 99/56
- So, 21/24 + 25/28 = 99/56
In mixed form: 143/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/24+25/28 21/24+50/28 21/48+25/28 21/24+25/56 63/24+25/28 21/24+75/28 21/72+25/28 21/24+25/84