Subtract 25/20 from 24/21
1st number: 1 3/21, 2nd number: 1 5/20
24/21 - 25/20 is -3/28.
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,
24/21 = 24 × 20/21 × 20 = 480/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
25/20 = 25 × 21/20 × 21 = 525/420 - Subtract the two like fractions:
480/420 - 525/420 = 480 - 525/420 = -45/420 - After reducing the fraction, the answer is -3/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/21-25/20 24/21-50/20 24/42-25/20 24/21-25/40 72/21-25/20 24/21-75/20 24/63-25/20 24/21-25/60