Add 20/21 and 4/24
20/21 + 4/24 is 47/42.
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,
4/24 = 4 × 7/24 × 7 = 28/168 - Add the two like fractions:
160/168 + 28/168 = 160 + 28/168 = 188/168 - 188/168 simplified gives 47/42
- So, 20/21 + 4/24 = 47/42
In mixed form: 15/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21+4/24 20/21+8/24 20/42+4/24 20/21+4/48 60/21+4/24 20/21+12/24 20/63+4/24 20/21+4/72 20/21+20/24 20/21+28/24