Subtract 20/32 from 5/18
5/18 - 20/32 is -25/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 32 is 288
Next, find the equivalent fraction of both fractional numbers with denominator 288 - For the 1st fraction, since 18 × 16 = 288,
5/18 = 5 × 16/18 × 16 = 80/288 - Likewise, for the 2nd fraction, since 32 × 9 = 288,
20/32 = 20 × 9/32 × 9 = 180/288 - Subtract the two like fractions:
80/288 - 180/288 = 80 - 180/288 = -100/288 - After reducing the fraction, the answer is -25/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/18-20/32 5/18-40/32 5/36-20/32 5/18-20/64 15/18-20/32 5/18-60/32 5/54-20/32 5/18-20/96 25/18-20/32 5/90-20/32 35/18-20/32