Subtract 5/12 from 20/70
20/70 - 5/12 is -11/84.
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,
20/70 = 20 × 6/70 × 6 = 120/420 - Likewise, for the 2nd fraction, since 12 × 35 = 420,
5/12 = 5 × 35/12 × 35 = 175/420 - Subtract the two like fractions:
120/420 - 175/420 = 120 - 175/420 = -55/420 - After reducing the fraction, the answer is -11/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/70-5/12 20/70-10/12 20/70-5/24 60/70-5/12 20/70-15/12 20/70-5/36 20/70-25/12 20/70-5/60 20/70-35/12 20/70-5/84