Add 25/21 and 18/8
1st number: 1 4/21, 2nd number: 2 2/8
25/21 + 18/8 is 289/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
25/21 = 25 × 8/21 × 8 = 200/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
18/8 = 18 × 21/8 × 21 = 378/168 - Add the two like fractions:
200/168 + 378/168 = 200 + 378/168 = 578/168 - 578/168 simplified gives 289/84
- So, 25/21 + 18/8 = 289/84
In mixed form: 337/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/21+18/8 25/21+36/8 25/42+18/8 25/21+18/16 75/21+18/8 25/21+54/8 25/63+18/8 25/21+18/24 25/21+90/8 25/21+18/40 25/21+18/56