Subtract 10/36 from 21/20
1st number: 1 1/20, 2nd number: 10/36
21/20 - 10/36 is 139/180.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
21/20 = 21 × 9/20 × 9 = 189/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
10/36 = 10 × 5/36 × 5 = 50/180 - Subtract the two like fractions:
189/180 - 50/180 = 189 - 50/180 = 139/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/20-10/36 21/20-20/36 21/40-10/36 21/20-10/72 63/20-10/36 21/20-30/36 21/60-10/36 21/20-50/36 21/20-70/36