Add 90/45 and 3/20
1st number: 2 0/45, 2nd number: 3/20
90/45 + 3/20 is 43/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
90/45 = 90 × 4/45 × 4 = 360/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
3/20 = 3 × 9/20 × 9 = 27/180 - Add the two like fractions:
360/180 + 27/180 = 360 + 27/180 = 387/180 - 387/180 simplified gives 43/20
- So, 90/45 + 3/20 = 43/20
In mixed form: 23/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/45+6/20 90/45+3/40 90/45+9/20 90/45+3/60 90/45+15/20 90/45+21/20