Subtract 72/10 from 20/9
1st number: 2 2/9, 2nd number: 7 2/10
20/9 - 72/10 is -224/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 10 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 9 × 10 = 90,
20/9 = 20 × 10/9 × 10 = 200/90 - Likewise, for the 2nd fraction, since 10 × 9 = 90,
72/10 = 72 × 9/10 × 9 = 648/90 - Subtract the two like fractions:
200/90 - 648/90 = 200 - 648/90 = -448/90 - After reducing the fraction, the answer is -224/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/9-72/10 20/18-72/10 20/9-72/20 60/9-72/10 20/27-72/10 20/9-72/30 20/45-72/10 20/9-72/50 20/63-72/10 20/9-72/70