Subtract 40/84 from 6/28
6/28 - 40/84 is -11/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
6/28 = 6 × 3/28 × 3 = 18/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
40/84 = 40 × 1/84 × 1 = 40/84 - Subtract the two like fractions:
18/84 - 40/84 = 18 - 40/84 = -22/84 - After reducing the fraction, the answer is -11/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/28-40/84 6/28-80/84 6/56-40/84 18/28-40/84 6/84-40/84 30/28-40/84 42/28-40/84