Subtract 90/81 from 24/15
1st number: 1 9/15, 2nd number: 1 9/81
24/15 - 90/81 is 22/45.
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,
24/15 = 24 × 27/15 × 27 = 648/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
90/81 = 90 × 5/81 × 5 = 450/405 - Subtract the two like fractions:
648/405 - 450/405 = 648 - 450/405 = 198/405 - After reducing the fraction, the answer is 22/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/15-90/81 24/30-90/81 72/15-90/81 24/45-90/81 24/75-90/81