Subtract 20/14 from 18/36
1st number: 18/36, 2nd number: 1 6/14
18/36 - 20/14 is -13/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 14 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
18/36 = 18 × 7/36 × 7 = 126/252 - Likewise, for the 2nd fraction, since 14 × 18 = 252,
20/14 = 20 × 18/14 × 18 = 360/252 - Subtract the two like fractions:
126/252 - 360/252 = 126 - 360/252 = -234/252 - After reducing the fraction, the answer is -13/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/36-40/14 18/72-20/14 18/36-20/28 54/36-20/14 18/36-60/14 18/36-20/42 90/36-20/14 18/36-20/70 18/36-20/98