Add 6/21 and 90/8
1st number: 6/21, 2nd number: 11 2/8
6/21 + 90/8 is 323/28.
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,
6/21 = 6 × 8/21 × 8 = 48/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
90/8 = 90 × 21/8 × 21 = 1890/168 - Add the two like fractions:
48/168 + 1890/168 = 48 + 1890/168 = 1938/168 - 1938/168 simplified gives 323/28
- So, 6/21 + 90/8 = 323/28
In mixed form: 1115/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/21+90/8 6/42+90/8 6/21+90/16 18/21+90/8 6/63+90/8 6/21+90/24 30/21+90/8 6/21+90/40 42/21+90/8 6/21+90/56