Subtract 84/40 from 8/12
1st number: 8/12, 2nd number: 2 4/40
8/12 - 84/40 is -43/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 12 × 10 = 120,
8/12 = 8 × 10/12 × 10 = 80/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
84/40 = 84 × 3/40 × 3 = 252/120 - Subtract the two like fractions:
80/120 - 252/120 = 80 - 252/120 = -172/120 - After reducing the fraction, the answer is -43/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/12-84/40 8/24-84/40 8/12-84/80 24/12-84/40 8/36-84/40 40/12-84/40 8/60-84/40 56/12-84/40 8/84-84/40