Subtract 42/7 from 6/20
1st number: 6/20, 2nd number: 6 0/7
6/20 - 42/7 is -57/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
6/20 = 6 × 7/20 × 7 = 42/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
42/7 = 42 × 20/7 × 20 = 840/140 - Subtract the two like fractions:
42/140 - 840/140 = 42 - 840/140 = -798/140 - After reducing the fraction, the answer is -57/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/20-42/7 6/20-84/7 6/40-42/7 6/20-42/14 18/20-42/7 6/60-42/7 6/20-42/21 30/20-42/7 6/20-42/35 42/20-42/7 6/20-42/49