Subtract 21/84 from 1/25
1/25 - 21/84 is -21/100.
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,
1/25 = 1 × 84/25 × 84 = 84/2100 - Likewise, for the 2nd fraction, since 84 × 25 = 2100,
21/84 = 21 × 25/84 × 25 = 525/2100 - Subtract the two like fractions:
84/2100 - 525/2100 = 84 - 525/2100 = -441/2100 - After reducing the fraction, the answer is -21/100
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/25-21/84 1/25-42/84 1/50-21/84 3/25-21/84 1/25-63/84 1/75-21/84 5/25-21/84 7/25-21/84