Add 90/40 and 30/90
1st number: 2 10/40, 2nd number: 30/90
90/40 + 30/90 is 31/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 90 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 90 × 4 = 360,
30/90 = 30 × 4/90 × 4 = 120/360 - Add the two like fractions:
810/360 + 120/360 = 810 + 120/360 = 930/360 - 930/360 simplified gives 31/12
- So, 90/40 + 30/90 = 31/12
In mixed form: 27/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/40+60/90 90/80+30/90