Subtract 20/14 from 18/20
1st number: 18/20, 2nd number: 1 6/14
18/20 - 20/14 is -37/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 14 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
18/20 = 18 × 7/20 × 7 = 126/140 - Likewise, for the 2nd fraction, since 14 × 10 = 140,
20/14 = 20 × 10/14 × 10 = 200/140 - Subtract the two like fractions:
126/140 - 200/140 = 126 - 200/140 = -74/140 - After reducing the fraction, the answer is -37/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/20-20/14 18/20-40/14 18/40-20/14 18/20-20/28 54/20-20/14 18/20-60/14 18/60-20/14 18/20-20/42 90/20-20/14 18/20-20/70 18/20-20/98