Subtract 72/9 from 81/10
1st number: 8 1/10, 2nd number: 8 0/9
81/10 - 72/9 is 1/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 9 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 10 × 9 = 90,
81/10 = 81 × 9/10 × 9 = 729/90 - Likewise, for the 2nd fraction, since 9 × 10 = 90,
72/9 = 72 × 10/9 × 10 = 720/90 - Subtract the two like fractions:
729/90 - 720/90 = 729 - 720/90 = 9/90 - After reducing the fraction, the answer is 1/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/20-72/9 81/10-72/18 81/30-72/9 81/10-72/27 81/50-72/9 81/10-72/45 81/70-72/9 81/10-72/63