Subtract 21/45 from 1/32
1/32 - 21/45 is -209/480.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 32 and 45 is 1440
Next, find the equivalent fraction of both fractional numbers with denominator 1440 - For the 1st fraction, since 32 × 45 = 1440,
1/32 = 1 × 45/32 × 45 = 45/1440 - Likewise, for the 2nd fraction, since 45 × 32 = 1440,
21/45 = 21 × 32/45 × 32 = 672/1440 - Subtract the two like fractions:
45/1440 - 672/1440 = 45 - 672/1440 = -627/1440 - After reducing the fraction, the answer is -209/480
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/32-21/45 1/32-42/45 1/64-21/45 1/32-21/90 3/32-21/45 1/32-63/45 1/96-21/45 5/32-21/45 7/32-21/45