Add 20/3 and 90/40
1st number: 6 2/3, 2nd number: 2 10/40
20/3 + 90/40 is 107/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 3 × 40 = 120,
20/3 = 20 × 40/3 × 40 = 800/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
90/40 = 90 × 3/40 × 3 = 270/120 - Add the two like fractions:
800/120 + 270/120 = 800 + 270/120 = 1070/120 - 1070/120 simplified gives 107/12
- So, 20/3 + 90/40 = 107/12
In mixed form: 811/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/3+90/40 20/6+90/40 20/3+90/80 60/3+90/40 20/9+90/40 20/15+90/40 20/21+90/40