Add 28/21 and 48/28
1st number: 1 7/21, 2nd number: 1 20/28
28/21 + 48/28 is 64/21.
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,
28/21 = 28 × 4/21 × 4 = 112/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
48/28 = 48 × 3/28 × 3 = 144/84 - Add the two like fractions:
112/84 + 144/84 = 112 + 144/84 = 256/84 - 256/84 simplified gives 64/21
- So, 28/21 + 48/28 = 64/21
In mixed form: 31/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/21+48/28 28/21+96/28 28/42+48/28 28/21+48/56 84/21+48/28 28/63+48/28 28/21+48/84