Add 75/21 and 20/8
1st number: 3 12/21, 2nd number: 2 4/8
75/21 + 20/8 is 85/14.
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,
75/21 = 75 × 8/21 × 8 = 600/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
20/8 = 20 × 21/8 × 21 = 420/168 - Add the two like fractions:
600/168 + 420/168 = 600 + 420/168 = 1020/168 - 1020/168 simplified gives 85/14
- So, 75/21 + 20/8 = 85/14
In mixed form: 61/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/21+40/8 75/42+20/8 75/21+20/16 75/21+60/8 75/63+20/8 75/21+20/24 75/21+20/40 75/21+20/56