Subtract 7/5 from 8/18
1st number: 8/18, 2nd number: 1 2/5
8/18 - 7/5 is -43/45.
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,
8/18 = 8 × 5/18 × 5 = 40/90 - Likewise, for the 2nd fraction, since 5 × 18 = 90,
7/5 = 7 × 18/5 × 18 = 126/90 - Subtract the two like fractions:
40/90 - 126/90 = 40 - 126/90 = -86/90 - After reducing the fraction, the answer is -43/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/18-7/5 8/18-14/5 8/36-7/5 8/18-7/10 24/18-7/5 8/18-21/5 8/54-7/5 8/18-7/15 40/18-7/5 8/18-35/5 8/90-7/5 8/18-7/25 56/18-7/5 8/18-49/5 8/18-7/35