Subtract 80/40 from 2/18
1st number: 2/18, 2nd number: 2 0/40
2/18 - 80/40 is -17/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 18 × 20 = 360,
2/18 = 2 × 20/18 × 20 = 40/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
80/40 = 80 × 9/40 × 9 = 720/360 - Subtract the two like fractions:
40/360 - 720/360 = 40 - 720/360 = -680/360 - After reducing the fraction, the answer is -17/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/18-80/40 2/36-80/40 6/18-80/40 2/54-80/40 10/18-80/40 2/90-80/40 14/18-80/40