Add 10/90 and 4/81
10/90 + 4/81 is 13/81.
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,
10/90 = 10 × 9/90 × 9 = 90/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
4/81 = 4 × 10/81 × 10 = 40/810 - Add the two like fractions:
90/810 + 40/810 = 90 + 40/810 = 130/810 - 130/810 simplified gives 13/81
- So, 10/90 + 4/81 = 13/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/90+4/81 10/90+8/81 30/90+4/81 10/90+12/81 50/90+4/81 10/90+20/81 70/90+4/81 10/90+28/81