Subtract 21/36 from 10/45
10/45 - 21/36 is -13/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
10/45 = 10 × 4/45 × 4 = 40/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
21/36 = 21 × 5/36 × 5 = 105/180 - Subtract the two like fractions:
40/180 - 105/180 = 40 - 105/180 = -65/180 - After reducing the fraction, the answer is -13/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/45-21/36 10/45-42/36 10/90-21/36 10/45-21/72 30/45-21/36 10/45-63/36 50/45-21/36 70/45-21/36