Subtract 10/8 from 20/36
1st number: 20/36, 2nd number: 1 2/8
20/36 - 10/8 is -25/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 8 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 36 × 2 = 72,
20/36 = 20 × 2/36 × 2 = 40/72 - Likewise, for the 2nd fraction, since 8 × 9 = 72,
10/8 = 10 × 9/8 × 9 = 90/72 - Subtract the two like fractions:
40/72 - 90/72 = 40 - 90/72 = -50/72 - After reducing the fraction, the answer is -25/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/36-10/8 20/36-20/8 20/72-10/8 20/36-10/16 60/36-10/8 20/36-30/8 20/36-10/24 20/36-50/8 20/36-10/40 20/36-70/8 20/36-10/56