Subtract 25/24 from 21/84
1st number: 21/84, 2nd number: 1 1/24
21/84 - 25/24 is -19/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 84 × 2 = 168,
21/84 = 21 × 2/84 × 2 = 42/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
25/24 = 25 × 7/24 × 7 = 175/168 - Subtract the two like fractions:
42/168 - 175/168 = 42 - 175/168 = -133/168 - After reducing the fraction, the answer is -19/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/84-25/24 21/84-50/24 21/84-25/48 63/84-25/24 21/84-75/24 21/84-25/72