Subtract 21/24 from 63/42
1st number: 1 21/42, 2nd number: 21/24
63/42 - 21/24 is 5/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 42 × 4 = 168,
63/42 = 63 × 4/42 × 4 = 252/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
21/24 = 21 × 7/24 × 7 = 147/168 - Subtract the two like fractions:
252/168 - 147/168 = 252 - 147/168 = 105/168 - After reducing the fraction, the answer is 5/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/42-42/24 63/84-21/24 63/42-21/48 63/42-63/24 63/42-21/72