Add 7/21 and 24/5
1st number: 7/21, 2nd number: 4 4/5
7/21 + 24/5 is 77/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 5 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
7/21 = 7 × 5/21 × 5 = 35/105 - Likewise, for the 2nd fraction, since 5 × 21 = 105,
24/5 = 24 × 21/5 × 21 = 504/105 - Add the two like fractions:
35/105 + 504/105 = 35 + 504/105 = 539/105 - 539/105 simplified gives 77/15
- So, 7/21 + 24/5 = 77/15
In mixed form: 52/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/21+24/5 7/21+48/5 7/42+24/5 7/21+24/10 7/21+72/5 7/63+24/5 7/21+24/15 35/21+24/5 7/21+24/25 49/21+24/5 7/21+24/35