Subtract 10/27 from 81/18
1st number: 4 9/18, 2nd number: 10/27
81/18 - 10/27 is 223/54.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 27 is 54
Next, find the equivalent fraction of both fractional numbers with denominator 54 - For the 1st fraction, since 18 × 3 = 54,
81/18 = 81 × 3/18 × 3 = 243/54 - Likewise, for the 2nd fraction, since 27 × 2 = 54,
10/27 = 10 × 2/27 × 2 = 20/54 - Subtract the two like fractions:
243/54 - 20/54 = 243 - 20/54 = 223/54 - In mixed form: 47/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/18-20/27 81/36-10/27 81/18-10/54 81/18-30/27 81/54-10/27 81/18-10/81 81/18-50/27 81/90-10/27 81/18-70/27