Add 90/40 and 20/9
1st number: 2 10/40, 2nd number: 2 2/9
90/40 + 20/9 is 161/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 9 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
90/40 = 90 × 9/40 × 9 = 810/360 - Likewise, for the 2nd fraction, since 9 × 40 = 360,
20/9 = 20 × 40/9 × 40 = 800/360 - Add the two like fractions:
810/360 + 800/360 = 810 + 800/360 = 1610/360 - 1610/360 simplified gives 161/36
- So, 90/40 + 20/9 = 161/36
In mixed form: 417/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/40+40/9 90/80+20/9 90/40+20/18 90/40+60/9 90/40+20/27 90/40+20/45 90/40+20/63