Subtract 8/84 from 75/21
1st number: 3 12/21, 2nd number: 8/84
75/21 - 8/84 is 73/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
75/21 = 75 × 4/21 × 4 = 300/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
8/84 = 8 × 1/84 × 1 = 8/84 - Subtract the two like fractions:
300/84 - 8/84 = 300 - 8/84 = 292/84 - After reducing the fraction, the answer is 73/21
- In mixed form: 310/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/21-16/84 75/42-8/84 75/21-24/84 75/63-8/84 75/21-40/84 75/21-56/84