Subtract 6/4 from 80/21
1st number: 3 17/21, 2nd number: 1 2/4
80/21 - 6/4 is 97/42.
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,
6/4 = 6 × 21/4 × 21 = 126/84 - Subtract the two like fractions:
320/84 - 126/84 = 320 - 126/84 = 194/84 - After reducing the fraction, the answer is 97/42
- In mixed form: 213/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/21-12/4 80/42-6/4 80/21-6/8 80/21-18/4 80/63-6/4 80/21-6/12 80/21-30/4 80/21-6/20 80/21-42/4 80/21-6/28