Subtract 21/36 from 1/5
1/5 - 21/36 is -23/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 5 × 36 = 180,
1/5 = 1 × 36/5 × 36 = 36/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
21/36 = 21 × 5/36 × 5 = 105/180 - Subtract the two like fractions:
36/180 - 105/180 = 36 - 105/180 = -69/180 - After reducing the fraction, the answer is -23/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/5-21/36 1/5-42/36 1/10-21/36 1/5-21/72 3/5-21/36 1/5-63/36 1/15-21/36 1/25-21/36 7/5-21/36 1/35-21/36