Subtract 1/84 from 25/21
1st number: 1 4/21, 2nd number: 1/84
25/21 - 1/84 is 33/28.
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,
25/21 = 25 × 4/21 × 4 = 100/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
1/84 = 1 × 1/84 × 1 = 1/84 - Subtract the two like fractions:
100/84 - 1/84 = 100 - 1/84 = 99/84 - After reducing the fraction, the answer is 33/28
- In mixed form: 15/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/21-1/84 25/21-2/84 25/42-1/84 75/21-1/84 25/21-3/84 25/63-1/84 25/21-5/84 25/21-7/84