Subtract 2/18 from 81/45
1st number: 1 36/45, 2nd number: 2/18
81/45 - 2/18 is 76/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
81/45 = 81 × 2/45 × 2 = 162/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
2/18 = 2 × 5/18 × 5 = 10/90 - Subtract the two like fractions:
162/90 - 10/90 = 162 - 10/90 = 152/90 - After reducing the fraction, the answer is 76/45
- In mixed form: 131/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/45-4/18 81/90-2/18 81/45-2/36 81/45-6/18 81/45-2/54 81/45-10/18 81/45-2/90 81/45-14/18