Subtract 24/25 from 12/21
12/21 - 24/25 is -68/175.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 25 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 21 × 25 = 525,
12/21 = 12 × 25/21 × 25 = 300/525 - Likewise, for the 2nd fraction, since 25 × 21 = 525,
24/25 = 24 × 21/25 × 21 = 504/525 - Subtract the two like fractions:
300/525 - 504/525 = 300 - 504/525 = -204/525 - After reducing the fraction, the answer is -68/175
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21-24/25 12/21-48/25 12/42-24/25 12/21-24/50 36/21-24/25 12/21-72/25 12/63-24/25 12/21-24/75 60/21-24/25 84/21-24/25