Subtract 80/40 from 40/60
1st number: 40/60, 2nd number: 2 0/40
40/60 - 80/40 is -4/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 60 × 2 = 120,
40/60 = 40 × 2/60 × 2 = 80/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
80/40 = 80 × 3/40 × 3 = 240/120 - Subtract the two like fractions:
80/120 - 240/120 = 80 - 240/120 = -160/120 - After reducing the fraction, the answer is -4/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/60-80/40