Subtract 8/84 from 4/70
4/70 - 8/84 is -4/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 70 × 6 = 420,
4/70 = 4 × 6/70 × 6 = 24/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
8/84 = 8 × 5/84 × 5 = 40/420 - Subtract the two like fractions:
24/420 - 40/420 = 24 - 40/420 = -16/420 - After reducing the fraction, the answer is -4/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/70-8/84 4/70-16/84 12/70-8/84 4/70-24/84 20/70-8/84 4/70-40/84 28/70-8/84 4/70-56/84