Subtract 32/81 from 90/15
1st number: 6 0/15, 2nd number: 32/81
90/15 - 32/81 is 454/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 81 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 15 × 27 = 405,
90/15 = 90 × 27/15 × 27 = 2430/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
32/81 = 32 × 5/81 × 5 = 160/405 - Subtract the two like fractions:
2430/405 - 160/405 = 2430 - 160/405 = 2270/405 - After reducing the fraction, the answer is 454/81
- In mixed form: 549/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/15-64/81 90/30-32/81 90/15-96/81 90/45-32/81 90/75-32/81