Subtract 8/21 from 63/4
1st number: 15 3/4, 2nd number: 8/21
63/4 - 8/21 is 1291/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
63/4 = 63 × 21/4 × 21 = 1323/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
8/21 = 8 × 4/21 × 4 = 32/84 - Subtract the two like fractions:
1323/84 - 32/84 = 1323 - 32/84 = 1291/84 - In mixed form: 1531/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/4-16/21 63/8-8/21 63/4-8/42 63/4-24/21 63/12-8/21 63/4-8/63 63/4-40/21 63/20-8/21 63/4-56/21 63/28-8/21