Subtract 35/81 from 4/90
4/90 - 35/81 is -157/405.
Steps for subtracting 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,
4/90 = 4 × 9/90 × 9 = 36/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
35/81 = 35 × 10/81 × 10 = 350/810 - Subtract the two like fractions:
36/810 - 350/810 = 36 - 350/810 = -314/810 - After reducing the fraction, the answer is -157/405
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/90-35/81 4/90-70/81 12/90-35/81 20/90-35/81 28/90-35/81