Subtract 8/40 from 21/14
1st number: 1 7/14, 2nd number: 8/40
21/14 - 8/40 is 13/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 14 × 20 = 280,
21/14 = 21 × 20/14 × 20 = 420/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
8/40 = 8 × 7/40 × 7 = 56/280 - Subtract the two like fractions:
420/280 - 56/280 = 420 - 56/280 = 364/280 - After reducing the fraction, the answer is 13/10
- In mixed form: 13/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/14-8/40 21/14-16/40 21/28-8/40 21/14-8/80 63/14-8/40 21/14-24/40 21/42-8/40 21/70-8/40 21/14-56/40 21/98-8/40