Subtract 1/90 from 35/81
35/81 - 1/90 is 341/810.
Steps for subtracting 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,
35/81 = 35 × 10/81 × 10 = 350/810 - Likewise, for the 2nd fraction, since 90 × 9 = 810,
1/90 = 1 × 9/90 × 9 = 9/810 - Subtract the two like fractions:
350/810 - 9/810 = 350 - 9/810 = 341/810
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/81-1/90 35/81-2/90 35/81-3/90 35/81-5/90 35/81-7/90