Subtract 4/21 from 84/25
1st number: 3 9/25, 2nd number: 4/21
84/25 - 4/21 is 1664/525.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 21 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 25 × 21 = 525,
84/25 = 84 × 21/25 × 21 = 1764/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
4/21 = 4 × 25/21 × 25 = 100/525 - Subtract the two like fractions:
1764/525 - 100/525 = 1764 - 100/525 = 1664/525 - In mixed form: 389/525
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/25-8/21 84/50-4/21 84/25-4/42 84/25-12/21 84/75-4/21 84/25-4/63 84/25-20/21 84/25-28/21