Subtract 6/48 from 20/21
20/21 - 6/48 is 139/168.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 48 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 21 × 16 = 336,
20/21 = 20 × 16/21 × 16 = 320/336 - Likewise, for the 2nd fraction, since 48 × 7 = 336,
6/48 = 6 × 7/48 × 7 = 42/336 - Subtract the two like fractions:
320/336 - 42/336 = 320 - 42/336 = 278/336 - After reducing the fraction, the answer is 139/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21-6/48 20/21-12/48 20/42-6/48 20/21-6/96 60/21-6/48 20/21-18/48 20/63-6/48 20/21-30/48 20/21-42/48