Add 80/90 and 27/20
1st number: 80/90, 2nd number: 1 7/20
80/90 + 27/20 is 403/180.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
80/90 = 80 × 2/90 × 2 = 160/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
27/20 = 27 × 9/20 × 9 = 243/180 - Add the two like fractions:
160/180 + 243/180 = 160 + 243/180 = 403/180 - So, 80/90 + 27/20 = 403/180
In mixed form: 243/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/90+54/20 80/90+27/40 80/90+81/20 80/90+27/60