Add 98/90 and 20/81
1st number: 1 8/90, 2nd number: 20/81
98/90 + 20/81 is 541/405.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 81 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 90 × 9 = 810,
98/90 = 98 × 9/90 × 9 = 882/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
20/81 = 20 × 10/81 × 10 = 200/810 - Add the two like fractions:
882/810 + 200/810 = 882 + 200/810 = 1082/810 - 1082/810 simplified gives 541/405
- So, 98/90 + 20/81 = 541/405
In mixed form: 1136/405
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/90+40/81 98/90+60/81