Subtract 56/12 from 40/70
1st number: 40/70, 2nd number: 4 8/12
40/70 - 56/12 is -86/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 12 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 70 × 6 = 420,
40/70 = 40 × 6/70 × 6 = 240/420 - Likewise, for the 2nd fraction, since 12 × 35 = 420,
56/12 = 56 × 35/12 × 35 = 1960/420 - Subtract the two like fractions:
240/420 - 1960/420 = 240 - 1960/420 = -1720/420 - After reducing the fraction, the answer is -86/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/70-56/12 40/70-56/24 40/70-56/36 40/70-56/60 40/70-56/84