Subtract 63/8 from 4/84
1st number: 4/84, 2nd number: 7 7/8
4/84 - 63/8 is -1315/168.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 84 × 2 = 168,
4/84 = 4 × 2/84 × 2 = 8/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
63/8 = 63 × 21/8 × 21 = 1323/168 - Subtract the two like fractions:
8/168 - 1323/168 = 8 - 1323/168 = -1315/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/84-63/8 4/84-63/16 12/84-63/8 4/84-63/24 20/84-63/8 4/84-63/40 28/84-63/8 4/84-63/56