Subtract 16/20 from 1/7
1/7 - 16/20 is -23/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 7 × 20 = 140,
1/7 = 1 × 20/7 × 20 = 20/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
16/20 = 16 × 7/20 × 7 = 112/140 - Subtract the two like fractions:
20/140 - 112/140 = 20 - 112/140 = -92/140 - After reducing the fraction, the answer is -23/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/7-16/20 1/7-32/20 1/14-16/20 1/7-16/40 3/7-16/20 1/7-48/20 1/21-16/20 1/7-16/60 5/7-16/20 1/7-80/20 1/35-16/20 1/49-16/20