Add 20/90 and 45/27
1st number: 20/90, 2nd number: 1 18/27
20/90 + 45/27 is 17/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 27 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 90 × 3 = 270,
20/90 = 20 × 3/90 × 3 = 60/270 - Likewise, for the 2nd fraction, since 27 × 10 = 270,
45/27 = 45 × 10/27 × 10 = 450/270 - Add the two like fractions:
60/270 + 450/270 = 60 + 450/270 = 510/270 - 510/270 simplified gives 17/9
- So, 20/90 + 45/27 = 17/9
In mixed form: 18/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/90+45/27 20/90+90/27 20/90+45/54 60/90+45/27 20/90+45/81