Subtract 48/24 from 21/84
1st number: 21/84, 2nd number: 2 0/24
21/84 - 48/24 is -7/4.
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,
48/24 = 48 × 7/24 × 7 = 336/168 - Subtract the two like fractions:
42/168 - 336/168 = 42 - 336/168 = -294/168 - After reducing the fraction, the answer is -7/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/84-48/24 21/84-96/24 63/84-48/24 21/84-48/72