Subtract 21/32 from 1/18
1/18 - 21/32 is -173/288.
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,
1/18 = 1 × 16/18 × 16 = 16/288 - Likewise, for the 2nd fraction, since 32 × 9 = 288,
21/32 = 21 × 9/32 × 9 = 189/288 - Subtract the two like fractions:
16/288 - 189/288 = 16 - 189/288 = -173/288
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/18-21/32 1/18-42/32 1/36-21/32 1/18-21/64 3/18-21/32 1/18-63/32 1/54-21/32 1/18-21/96 5/18-21/32 1/90-21/32 7/18-21/32