Add 8/21 and 24/20, Solve 8/21 + 1 4/20 as a fraction

Add 8/21 and 24/20

1^st number: 8/21, 2^nd number: 1 4/20

8/21 + 24/20 is 166/105.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 20 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 21 × 20 = 420,
8/21 = 8 × 20/21 × 20 = 160/420
Likewise, for the 2nd fraction, since 20 × 21 = 420,
24/20 = 24 × 21/20 × 21 = 504/420
Add the two like fractions:
160/420 + 504/420 = 160 + 504/420 = 664/420
664/420 simplified gives 166/105
So, 8/21 + 24/20 = 166/105
In mixed form: 161/105

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad