Subtract 8/4 from 40/84
1st number: 40/84, 2nd number: 2 0/4
40/84 - 8/4 is -32/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
40/84 = 40 × 1/84 × 1 = 40/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
8/4 = 8 × 21/4 × 21 = 168/84 - Subtract the two like fractions:
40/84 - 168/84 = 40 - 168/84 = -128/84 - After reducing the fraction, the answer is -32/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/84-8/4 40/84-16/4 40/84-24/4 40/84-8/12 40/84-40/4 40/84-8/20 40/84-56/4 40/84-8/28