Subtract 90/81 from 36/5
1st number: 7 1/5, 2nd number: 1 9/81
36/5 - 90/81 is 274/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 81 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 5 × 81 = 405,
36/5 = 36 × 81/5 × 81 = 2916/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
90/81 = 90 × 5/81 × 5 = 450/405 - Subtract the two like fractions:
2916/405 - 450/405 = 2916 - 450/405 = 2466/405 - After reducing the fraction, the answer is 274/45
- In mixed form: 64/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/5-90/81 36/10-90/81 36/15-90/81 36/25-90/81 36/35-90/81