Subtract 25/84 from 21/18
1st number: 1 3/18, 2nd number: 25/84
21/18 - 25/84 is 73/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 84 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 18 × 14 = 252,
21/18 = 21 × 14/18 × 14 = 294/252 - Likewise, for the 2nd fraction, since 84 × 3 = 252,
25/84 = 25 × 3/84 × 3 = 75/252 - Subtract the two like fractions:
294/252 - 75/252 = 294 - 75/252 = 219/252 - After reducing the fraction, the answer is 73/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/18-25/84 21/18-50/84 21/36-25/84 63/18-25/84 21/18-75/84 21/54-25/84 21/90-25/84