Subtract 90/81 from 32/90
1st number: 32/90, 2nd number: 1 9/81
32/90 - 90/81 is -34/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 81 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 90 × 9 = 810,
32/90 = 32 × 9/90 × 9 = 288/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
90/81 = 90 × 10/81 × 10 = 900/810 - Subtract the two like fractions:
288/810 - 900/810 = 288 - 900/810 = -612/810 - After reducing the fraction, the answer is -34/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 64/90-90/81 96/90-90/81