Subtract 24/40 from 21/14
1st number: 1 7/14, 2nd number: 24/40
21/14 - 24/40 is 9/10.
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,
24/40 = 24 × 7/40 × 7 = 168/280 - Subtract the two like fractions:
420/280 - 168/280 = 420 - 168/280 = 252/280 - After reducing the fraction, the answer is 9/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/14-24/40 21/14-48/40 21/28-24/40 21/14-24/80 63/14-24/40 21/14-72/40 21/42-24/40 21/70-24/40 21/98-24/40