Add 24/15 and 21/90
1st number: 1 9/15, 2nd number: 21/90
24/15 + 21/90 is 11/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 15 × 6 = 90,
24/15 = 24 × 6/15 × 6 = 144/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
21/90 = 21 × 1/90 × 1 = 21/90 - Add the two like fractions:
144/90 + 21/90 = 144 + 21/90 = 165/90 - 165/90 simplified gives 11/6
- So, 24/15 + 21/90 = 11/6
In mixed form: 15/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/15+21/90 24/15+42/90 24/30+21/90 72/15+21/90 24/15+63/90 24/45+21/90 24/75+21/90