Subtract 40/18 from 81/10
1st number: 8 1/10, 2nd number: 2 4/18
81/10 - 40/18 is 529/90.
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,
81/10 = 81 × 9/10 × 9 = 729/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
40/18 = 40 × 5/18 × 5 = 200/90 - Subtract the two like fractions:
729/90 - 200/90 = 729 - 200/90 = 529/90 - In mixed form: 579/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/10-80/18 81/20-40/18 81/10-40/36 81/30-40/18 81/10-40/54 81/50-40/18 81/10-40/90 81/70-40/18