Add 24/8 and 30/21
1st number: 3 0/8, 2nd number: 1 9/21
24/8 + 30/21 is 31/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 8 × 21 = 168,
24/8 = 24 × 21/8 × 21 = 504/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
30/21 = 30 × 8/21 × 8 = 240/168 - Add the two like fractions:
504/168 + 240/168 = 504 + 240/168 = 744/168 - 744/168 simplified gives 31/7
- So, 24/8 + 30/21 = 31/7
In mixed form: 43/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/8+30/21 24/8+60/21 24/16+30/21 24/8+30/42 72/8+30/21 24/8+90/21 24/8+30/63 24/40+30/21 24/56+30/21