Subtract 24/20 from 5/21
1st number: 5/21, 2nd number: 1 4/20
5/21 - 24/20 is -101/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
5/21 = 5 × 20/21 × 20 = 100/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
24/20 = 24 × 21/20 × 21 = 504/420 - Subtract the two like fractions:
100/420 - 504/420 = 100 - 504/420 = -404/420 - After reducing the fraction, the answer is -101/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21-24/20 5/21-48/20 5/42-24/20 5/21-24/40 15/21-24/20 5/21-72/20 5/63-24/20 5/21-24/60 25/21-24/20 35/21-24/20