Subtract 40/80 from 8/12
8/12 - 40/80 is 1/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 12 × 20 = 240,
8/12 = 8 × 20/12 × 20 = 160/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
40/80 = 40 × 3/80 × 3 = 120/240 - Subtract the two like fractions:
160/240 - 120/240 = 160 - 120/240 = 40/240 - After reducing the fraction, the answer is 1/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/12-40/80 8/24-40/80 24/12-40/80 8/36-40/80 40/12-40/80 8/60-40/80 56/12-40/80 8/84-40/80