Add 21/90 and 49/40
1st number: 21/90, 2nd number: 1 9/40
21/90 + 49/40 is 35/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
21/90 = 21 × 4/90 × 4 = 84/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
49/40 = 49 × 9/40 × 9 = 441/360 - Add the two like fractions:
84/360 + 441/360 = 84 + 441/360 = 525/360 - 525/360 simplified gives 35/24
- So, 21/90 + 49/40 = 35/24
In mixed form: 111/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/90+49/40 21/90+98/40 21/90+49/80 63/90+49/40