Subtract 9/84 from 21/25
21/25 - 9/84 is 513/700.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 84 is 2100
Next, find the equivalent fraction of both fractional numbers with denominator 2100 - For the 1st fraction, since 25 × 84 = 2100,
21/25 = 21 × 84/25 × 84 = 1764/2100 - Likewise, for the 2nd fraction, since 84 × 25 = 2100,
9/84 = 9 × 25/84 × 25 = 225/2100 - Subtract the two like fractions:
1764/2100 - 225/2100 = 1764 - 225/2100 = 1539/2100 - After reducing the fraction, the answer is 513/700
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/25-9/84 21/25-18/84 21/50-9/84 63/25-9/84 21/25-27/84 21/75-9/84 21/25-45/84 21/25-63/84