Subtract 56/70 from 40/84
40/84 - 56/70 is -34/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 70 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
40/84 = 40 × 5/84 × 5 = 200/420 - Likewise, for the 2nd fraction, since 70 × 6 = 420,
56/70 = 56 × 6/70 × 6 = 336/420 - Subtract the two like fractions:
200/420 - 336/420 = 200 - 336/420 = -136/420 - After reducing the fraction, the answer is -34/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/84-56/70