Subtract 15/54 from 40/84
40/84 - 15/54 is 25/126.
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,
40/84 = 40 × 9/84 × 9 = 360/756 - Likewise, for the 2nd fraction, since 54 × 14 = 756,
15/54 = 15 × 14/54 × 14 = 210/756 - Subtract the two like fractions:
360/756 - 210/756 = 360 - 210/756 = 150/756 - After reducing the fraction, the answer is 25/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/84-15/54 40/84-30/54 40/84-45/54 40/84-75/54