Subtract 20/18 from 16/20
1st number: 16/20, 2nd number: 1 2/18
16/20 - 20/18 is -14/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 18 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
16/20 = 16 × 9/20 × 9 = 144/180 - Likewise, for the 2nd fraction, since 18 × 10 = 180,
20/18 = 20 × 10/18 × 10 = 200/180 - Subtract the two like fractions:
144/180 - 200/180 = 144 - 200/180 = -56/180 - After reducing the fraction, the answer is -14/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/20-20/18 16/20-40/18 16/40-20/18 16/20-20/36 48/20-20/18 16/20-60/18 16/60-20/18 16/20-20/54 80/20-20/18 16/20-20/90