Add 90/40 and 30/9
1st number: 2 10/40, 2nd number: 3 3/9
90/40 + 30/9 is 67/12.
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,
30/9 = 30 × 40/9 × 40 = 1200/360 - Add the two like fractions:
810/360 + 1200/360 = 810 + 1200/360 = 2010/360 - 2010/360 simplified gives 67/12
- So, 90/40 + 30/9 = 67/12
In mixed form: 57/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/40+60/9 90/80+30/9 90/40+30/18 90/40+90/9 90/40+30/27 90/40+30/45 90/40+30/63