Subtract 8/42 from 3/4
3/4 - 8/42 is 47/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
3/4 = 3 × 21/4 × 21 = 63/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
8/42 = 8 × 2/42 × 2 = 16/84 - Subtract the two like fractions:
63/84 - 16/84 = 63 - 16/84 = 47/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/4-8/42 3/4-16/42 3/8-8/42 3/4-8/84 9/4-8/42 3/4-24/42 3/12-8/42 15/4-8/42 3/4-40/42 3/20-8/42 21/4-8/42 3/4-56/42 3/28-8/42