Subtract 40/5 from 7/18
1st number: 7/18, 2nd number: 8 0/5
7/18 - 40/5 is -137/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 5 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
7/18 = 7 × 5/18 × 5 = 35/90 - Likewise, for the 2nd fraction, since 5 × 18 = 90,
40/5 = 40 × 18/5 × 18 = 720/90 - Subtract the two like fractions:
35/90 - 720/90 = 35 - 720/90 = -685/90 - After reducing the fraction, the answer is -137/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/18-40/5 7/18-80/5 7/36-40/5 7/18-40/10 21/18-40/5 7/54-40/5 7/18-40/15 35/18-40/5 7/90-40/5 7/18-40/25 49/18-40/5 7/18-40/35