Subtract 10/9 from 20/8
1st number: 2 4/8, 2nd number: 1 1/9
20/8 - 10/9 is 25/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 9 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 8 × 9 = 72,
20/8 = 20 × 9/8 × 9 = 180/72 - Likewise, for the 2nd fraction, since 9 × 8 = 72,
10/9 = 10 × 8/9 × 8 = 80/72 - Subtract the two like fractions:
180/72 - 80/72 = 180 - 80/72 = 100/72 - After reducing the fraction, the answer is 25/18
- In mixed form: 17/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/8-10/9 20/8-20/9 20/16-10/9 20/8-10/18 60/8-10/9 20/8-30/9 20/24-10/9 20/8-10/27 20/8-50/9 20/40-10/9 20/8-10/45 20/8-70/9 20/56-10/9 20/8-10/63