Subtract 80/40 from 20/36
1st number: 20/36, 2nd number: 2 0/40
20/36 - 80/40 is -13/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 36 × 10 = 360,
20/36 = 20 × 10/36 × 10 = 200/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
80/40 = 80 × 9/40 × 9 = 720/360 - Subtract the two like fractions:
200/360 - 720/360 = 200 - 720/360 = -520/360 - After reducing the fraction, the answer is -13/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/36-80/40 20/72-80/40 60/36-80/40