Add 28/24 and 1/21
1st number: 1 4/24, 2nd number: 1/21
28/24 + 1/21 is 17/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 24 × 7 = 168,
28/24 = 28 × 7/24 × 7 = 196/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
1/21 = 1 × 8/21 × 8 = 8/168 - Add the two like fractions:
196/168 + 8/168 = 196 + 8/168 = 204/168 - 204/168 simplified gives 17/14
- So, 28/24 + 1/21 = 17/14
In mixed form: 13/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/24+1/21 28/24+2/21 28/48+1/21 28/24+1/42 84/24+1/21 28/24+3/21 28/72+1/21 28/24+1/63 28/24+5/21 28/24+7/21