Add 1/21 and 18/8
1st number: 1/21, 2nd number: 2 2/8
1/21 + 18/8 is 193/84.
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,
1/21 = 1 × 8/21 × 8 = 8/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
18/8 = 18 × 21/8 × 21 = 378/168 - Add the two like fractions:
8/168 + 378/168 = 8 + 378/168 = 386/168 - 386/168 simplified gives 193/84
- So, 1/21 + 18/8 = 193/84
In mixed form: 225/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/21+18/8 1/21+36/8 1/42+18/8 1/21+18/16 3/21+18/8 1/21+54/8 1/63+18/8 1/21+18/24 5/21+18/8 1/21+90/8 1/21+18/40 7/21+18/8 1/21+18/56