Add 20/24 and 24/21
1st number: 20/24, 2nd number: 1 3/21
20/24 + 24/21 is 83/42.
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,
24/21 = 24 × 8/21 × 8 = 192/168 - Add the two like fractions:
140/168 + 192/168 = 140 + 192/168 = 332/168 - 332/168 simplified gives 83/42
- So, 20/24 + 24/21 = 83/42
In mixed form: 141/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/24+24/21 20/24+48/21 20/48+24/21 20/24+24/42 60/24+24/21 20/24+72/21 20/72+24/21 20/24+24/63