Add 25/8 and 21/28
1st number: 3 1/8, 2nd number: 21/28
25/8 + 21/28 is 31/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 28 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 8 × 7 = 56,
25/8 = 25 × 7/8 × 7 = 175/56 - Likewise, for the 2nd fraction, since 28 × 2 = 56,
21/28 = 21 × 2/28 × 2 = 42/56 - Add the two like fractions:
175/56 + 42/56 = 175 + 42/56 = 217/56 - 217/56 simplified gives 31/8
- So, 25/8 + 21/28 = 31/8
In mixed form: 37/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/8+21/28 25/8+42/28 25/16+21/28 25/8+21/56 75/8+21/28 25/8+63/28 25/24+21/28 25/8+21/84 25/40+21/28 25/56+21/28