Add 25/8 and 35/21
1st number: 3 1/8, 2nd number: 1 14/21
25/8 + 35/21 is 115/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 8 × 21 = 168,
25/8 = 25 × 21/8 × 21 = 525/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
35/21 = 35 × 8/21 × 8 = 280/168 - Add the two like fractions:
525/168 + 280/168 = 525 + 280/168 = 805/168 - 805/168 simplified gives 115/24
- So, 25/8 + 35/21 = 115/24
In mixed form: 419/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/8+35/21 25/8+70/21 25/16+35/21 25/8+35/42 75/8+35/21 25/24+35/21 25/8+35/63 25/40+35/21 25/56+35/21