Subtract 40/70 from 8/12
8/12 - 40/70 is 2/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 70 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 12 × 35 = 420,
8/12 = 8 × 35/12 × 35 = 280/420 - Likewise, for the 2nd fraction, since 70 × 6 = 420,
40/70 = 40 × 6/70 × 6 = 240/420 - Subtract the two like fractions:
280/420 - 240/420 = 280 - 240/420 = 40/420 - After reducing the fraction, the answer is 2/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/12-40/70 8/12-80/70 8/24-40/70 24/12-40/70 8/36-40/70 40/12-40/70 8/60-40/70 56/12-40/70 8/84-40/70