Subtract 81/90 from 5/3
1st number: 1 2/3, 2nd number: 81/90
5/3 - 81/90 is 23/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 3 × 30 = 90,
5/3 = 5 × 30/3 × 30 = 150/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
81/90 = 81 × 1/90 × 1 = 81/90 - Subtract the two like fractions:
150/90 - 81/90 = 150 - 81/90 = 69/90 - After reducing the fraction, the answer is 23/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/3-81/90 5/6-81/90 15/3-81/90 5/9-81/90 25/3-81/90 5/15-81/90 35/3-81/90 5/21-81/90