Subtract 5/10 from 8/81
8/81 - 5/10 is -65/162.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 10 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 81 × 10 = 810,
8/81 = 8 × 10/81 × 10 = 80/810 - Likewise, for the 2nd fraction, since 10 × 81 = 810,
5/10 = 5 × 81/10 × 81 = 405/810 - Subtract the two like fractions:
80/810 - 405/810 = 80 - 405/810 = -325/810 - After reducing the fraction, the answer is -65/162
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/81-5/10 8/81-5/20 24/81-5/10 8/81-15/10 8/81-5/30 40/81-5/10 8/81-25/10 8/81-5/50 56/81-5/10 8/81-35/10 8/81-5/70