Add 54/28 and 21/8
1st number: 1 26/28, 2nd number: 2 5/8
54/28 + 21/8 is 255/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 8 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 28 × 2 = 56,
54/28 = 54 × 2/28 × 2 = 108/56 - Likewise, for the 2nd fraction, since 8 × 7 = 56,
21/8 = 21 × 7/8 × 7 = 147/56 - Add the two like fractions:
108/56 + 147/56 = 108 + 147/56 = 255/56 - So, 54/28 + 21/8 = 255/56
In mixed form: 431/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/28+42/8 54/56+21/8 54/28+21/16 54/28+63/8 54/84+21/8 54/28+21/24 54/28+21/40 54/28+21/56