Subtract 81/18 from 2/10
1st number: 2/10, 2nd number: 4 9/18
2/10 - 81/18 is -43/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 10 × 9 = 90,
2/10 = 2 × 9/10 × 9 = 18/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
81/18 = 81 × 5/18 × 5 = 405/90 - Subtract the two like fractions:
18/90 - 405/90 = 18 - 405/90 = -387/90 - After reducing the fraction, the answer is -43/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/10-81/18 2/20-81/18 2/10-81/36 6/10-81/18 2/30-81/18 2/10-81/54 2/50-81/18 2/10-81/90 14/10-81/18 2/70-81/18