Add 45/3 and 90/20
1st number: 15 0/3, 2nd number: 4 10/20
45/3 + 90/20 is 39/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 3 × 20 = 60,
45/3 = 45 × 20/3 × 20 = 900/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
90/20 = 90 × 3/20 × 3 = 270/60 - Add the two like fractions:
900/60 + 270/60 = 900 + 270/60 = 1170/60 - 1170/60 simplified gives 39/2
- So, 45/3 + 90/20 = 39/2
In mixed form: 191/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/3+90/20 45/6+90/20 45/3+90/40 45/9+90/20 45/3+90/60 45/15+90/20 45/21+90/20