Add 90/81 and 8/90
1st number: 1 9/81, 2nd number: 8/90
90/81 + 8/90 is 6/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 90 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 81 × 10 = 810,
90/81 = 90 × 10/81 × 10 = 900/810 - Likewise, for the 2nd fraction, since 90 × 9 = 810,
8/90 = 8 × 9/90 × 9 = 72/810 - Add the two like fractions:
900/810 + 72/810 = 900 + 72/810 = 972/810 - 972/810 simplified gives 6/5
- So, 90/81 + 8/90 = 6/5
In mixed form: 11/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/81+16/90 90/81+24/90 90/81+40/90 90/81+56/90