Subtract 8/14 from 21/70
21/70 - 8/14 is -19/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 14 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 70 × 1 = 70,
21/70 = 21 × 1/70 × 1 = 21/70 - Likewise, for the 2nd fraction, since 14 × 5 = 70,
8/14 = 8 × 5/14 × 5 = 40/70 - Subtract the two like fractions:
21/70 - 40/70 = 21 - 40/70 = -19/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/70-8/14 21/70-16/14 21/70-8/28 63/70-8/14 21/70-24/14 21/70-8/42 21/70-40/14 21/70-8/70 21/70-56/14 21/70-8/98