Subtract 7/20 from 5/9
5/9 - 7/20 is 37/180.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 9 × 20 = 180,
5/9 = 5 × 20/9 × 20 = 100/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
7/20 = 7 × 9/20 × 9 = 63/180 - Subtract the two like fractions:
100/180 - 63/180 = 100 - 63/180 = 37/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/9-7/20 5/9-14/20 5/18-7/20 5/9-7/40 15/9-7/20 5/9-21/20 5/27-7/20 5/9-7/60 25/9-7/20 5/9-35/20 5/45-7/20 35/9-7/20 5/9-49/20 5/63-7/20