Subtract 63/4 from 4/21
1st number: 4/21, 2nd number: 15 3/4
4/21 - 63/4 is -1307/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
4/21 = 4 × 4/21 × 4 = 16/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
63/4 = 63 × 21/4 × 21 = 1323/84 - Subtract the two like fractions:
16/84 - 1323/84 = 16 - 1323/84 = -1307/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21-63/4 4/42-63/4 4/21-63/8 12/21-63/4 4/63-63/4 4/21-63/12 20/21-63/4 4/21-63/20 28/21-63/4 4/21-63/28