Subtract 42/54 from 10/84
10/84 - 42/54 is -83/126.
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,
10/84 = 10 × 9/84 × 9 = 90/756 - Likewise, for the 2nd fraction, since 54 × 14 = 756,
42/54 = 42 × 14/54 × 14 = 588/756 - Subtract the two like fractions:
90/756 - 588/756 = 90 - 588/756 = -498/756 - After reducing the fraction, the answer is -83/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/84-42/54 10/84-84/54 30/84-42/54 50/84-42/54 70/84-42/54