Subtract 20/54 from 6/84
6/84 - 20/54 is -113/378.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 54 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 84 × 9 = 756,
6/84 = 6 × 9/84 × 9 = 54/756 - Likewise, for the 2nd fraction, since 54 × 14 = 756,
20/54 = 20 × 14/54 × 14 = 280/756 - Subtract the two like fractions:
54/756 - 280/756 = 54 - 280/756 = -226/756 - After reducing the fraction, the answer is -113/378
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/84-20/54 6/84-40/54 18/84-20/54 6/84-60/54 30/84-20/54 42/84-20/54