Subtract 18/81 from 4/10
4/10 - 18/81 is 8/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 81 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 10 × 81 = 810,
4/10 = 4 × 81/10 × 81 = 324/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
18/81 = 18 × 10/81 × 10 = 180/810 - Subtract the two like fractions:
324/810 - 180/810 = 324 - 180/810 = 144/810 - After reducing the fraction, the answer is 8/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/10-18/81 4/10-36/81 4/20-18/81 12/10-18/81 4/10-54/81 4/30-18/81 20/10-18/81 4/10-90/81 4/50-18/81 28/10-18/81 4/70-18/81