Subtract 3/21 from 63/8
1st number: 7 7/8, 2nd number: 3/21
63/8 - 3/21 is 433/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 8 × 21 = 168,
63/8 = 63 × 21/8 × 21 = 1323/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
3/21 = 3 × 8/21 × 8 = 24/168 - Subtract the two like fractions:
1323/168 - 24/168 = 1323 - 24/168 = 1299/168 - After reducing the fraction, the answer is 433/56
- In mixed form: 741/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/8-6/21 63/16-3/21 63/8-3/42 63/8-9/21 63/24-3/21 63/8-3/63 63/8-15/21 63/40-3/21 63/56-3/21