Add 21/24 and 3/90
21/24 + 3/90 is 109/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 24 × 15 = 360,
21/24 = 21 × 15/24 × 15 = 315/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
3/90 = 3 × 4/90 × 4 = 12/360 - Add the two like fractions:
315/360 + 12/360 = 315 + 12/360 = 327/360 - 327/360 simplified gives 109/120
- So, 21/24 + 3/90 = 109/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/24+3/90 21/24+6/90 21/48+3/90 63/24+3/90 21/24+9/90 21/72+3/90 21/24+15/90 21/24+21/90