Subtract 40/25 from 25/21
1st number: 1 4/21, 2nd number: 1 15/25
25/21 - 40/25 is -43/105.
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,
25/21 = 25 × 25/21 × 25 = 625/525 - Likewise, for the 2nd fraction, since 25 × 21 = 525,
40/25 = 40 × 21/25 × 21 = 840/525 - Subtract the two like fractions:
625/525 - 840/525 = 625 - 840/525 = -215/525 - After reducing the fraction, the answer is -43/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/21-40/25 25/21-80/25 25/42-40/25 25/21-40/50 75/21-40/25 25/63-40/25 25/21-40/75