Subtract 25/4 from 80/21
1st number: 3 17/21, 2nd number: 6 1/4
80/21 - 25/4 is -205/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
80/21 = 80 × 4/21 × 4 = 320/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
25/4 = 25 × 21/4 × 21 = 525/84 - Subtract the two like fractions:
320/84 - 525/84 = 320 - 525/84 = -205/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/21-50/4 80/42-25/4 80/21-25/8 80/21-75/4 80/63-25/4 80/21-25/12 80/21-25/20 80/21-25/28