Add 40/90 and 90/30
1st number: 40/90, 2nd number: 3 0/30
40/90 + 90/30 is 31/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
40/90 = 40 × 1/90 × 1 = 40/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
90/30 = 90 × 3/30 × 3 = 270/90 - Add the two like fractions:
40/90 + 270/90 = 40 + 270/90 = 310/90 - 310/90 simplified gives 31/9
- So, 40/90 + 90/30 = 31/9
In mixed form: 34/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/90+90/30 40/90+90/60