Subtract 21/10 from 8/36
1st number: 8/36, 2nd number: 2 1/10
8/36 - 21/10 is -169/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 10 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 10 × 18 = 180,
21/10 = 21 × 18/10 × 18 = 378/180 - Subtract the two like fractions:
40/180 - 378/180 = 40 - 378/180 = -338/180 - After reducing the fraction, the answer is -169/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/36-21/10 8/36-42/10 8/72-21/10 8/36-21/20 24/36-21/10 8/36-63/10 8/36-21/30 40/36-21/10 8/36-21/50 56/36-21/10 8/36-21/70