Subtract 63/42 from 6/8
1st number: 6/8, 2nd number: 1 21/42
6/8 - 63/42 is -3/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 42 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 8 × 21 = 168,
6/8 = 6 × 21/8 × 21 = 126/168 - Likewise, for the 2nd fraction, since 42 × 4 = 168,
63/42 = 63 × 4/42 × 4 = 252/168 - Subtract the two like fractions:
126/168 - 252/168 = 126 - 252/168 = -126/168 - After reducing the fraction, the answer is -3/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/8-63/42 6/16-63/42 6/8-63/84 18/8-63/42 6/24-63/42 30/8-63/42 6/40-63/42 42/8-63/42 6/56-63/42