Add 20/21 and 15/24
20/21 + 15/24 is 265/168.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
20/21 = 20 × 8/21 × 8 = 160/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
15/24 = 15 × 7/24 × 7 = 105/168 - Add the two like fractions:
160/168 + 105/168 = 160 + 105/168 = 265/168 - So, 20/21 + 15/24 = 265/168
In mixed form: 197/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21+15/24 20/21+30/24 20/42+15/24 20/21+15/48 60/21+15/24 20/21+45/24 20/63+15/24 20/21+15/72 20/21+75/24