Subtract 3/36 from 20/28
20/28 - 3/36 is 53/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 28 × 9 = 252,
20/28 = 20 × 9/28 × 9 = 180/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
3/36 = 3 × 7/36 × 7 = 21/252 - Subtract the two like fractions:
180/252 - 21/252 = 180 - 21/252 = 159/252 - After reducing the fraction, the answer is 53/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/28-3/36 20/28-6/36 20/56-3/36 20/28-3/72 60/28-3/36 20/28-9/36 20/84-3/36 20/28-15/36 20/28-21/36