Subtract 80/25 from 4/21
1st number: 4/21, 2nd number: 3 5/25
4/21 - 80/25 is -316/105.
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,
4/21 = 4 × 25/21 × 25 = 100/525 - Likewise, for the 2nd fraction, since 25 × 21 = 525,
80/25 = 80 × 21/25 × 21 = 1680/525 - Subtract the two like fractions:
100/525 - 1680/525 = 100 - 1680/525 = -1580/525 - After reducing the fraction, the answer is -316/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21-80/25 4/42-80/25 4/21-80/50 12/21-80/25 4/63-80/25 4/21-80/75 20/21-80/25 28/21-80/25