Add 21/24 and 90/9
1st number: 21/24, 2nd number: 10 0/9
21/24 + 90/9 is 87/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 9 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 24 × 3 = 72,
21/24 = 21 × 3/24 × 3 = 63/72 - Likewise, for the 2nd fraction, since 9 × 8 = 72,
90/9 = 90 × 8/9 × 8 = 720/72 - Add the two like fractions:
63/72 + 720/72 = 63 + 720/72 = 783/72 - 783/72 simplified gives 87/8
- So, 21/24 + 90/9 = 87/8
In mixed form: 107/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/24+90/9 21/48+90/9 21/24+90/18 63/24+90/9 21/72+90/9 21/24+90/27 21/24+90/45 21/24+90/63