Subtract 75/84 from 84/21
1st number: 4 0/21, 2nd number: 75/84
84/21 - 75/84 is 87/28.
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,
84/21 = 84 × 4/21 × 4 = 336/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
75/84 = 75 × 1/84 × 1 = 75/84 - Subtract the two like fractions:
336/84 - 75/84 = 336 - 75/84 = 261/84 - After reducing the fraction, the answer is 87/28
- In mixed form: 33/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/42-75/84 84/63-75/84