Subtract 21/5 from 8/36
1st number: 8/36, 2nd number: 4 1/5
8/36 - 21/5 is -179/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 5 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 36 × 5 = 180,
8/36 = 8 × 5/36 × 5 = 40/180 - Likewise, for the 2nd fraction, since 5 × 36 = 180,
21/5 = 21 × 36/5 × 36 = 756/180 - Subtract the two like fractions:
40/180 - 756/180 = 40 - 756/180 = -716/180 - After reducing the fraction, the answer is -179/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/36-21/5 8/36-42/5 8/72-21/5 8/36-21/10 24/36-21/5 8/36-63/5 8/36-21/15 40/36-21/5 8/36-21/25 56/36-21/5 8/36-21/35