Add 20/24 and 7/21
20/24 + 7/21 is 7/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 24 × 7 = 168,
20/24 = 20 × 7/24 × 7 = 140/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
7/21 = 7 × 8/21 × 8 = 56/168 - Add the two like fractions:
140/168 + 56/168 = 140 + 56/168 = 196/168 - 196/168 simplified gives 7/6
- So, 20/24 + 7/21 = 7/6
In mixed form: 11/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/24+7/21 20/24+14/21 20/48+7/21 20/24+7/42 60/24+7/21 20/72+7/21 20/24+7/63 20/24+35/21 20/24+49/21