Subtract 7/5 from 20/18
1st number: 1 2/18, 2nd number: 1 2/5
20/18 - 7/5 is -13/45.
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,
20/18 = 20 × 5/18 × 5 = 100/90 - Likewise, for the 2nd fraction, since 5 × 18 = 90,
7/5 = 7 × 18/5 × 18 = 126/90 - Subtract the two like fractions:
100/90 - 126/90 = 100 - 126/90 = -26/90 - After reducing the fraction, the answer is -13/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/18-7/5 20/18-14/5 20/36-7/5 20/18-7/10 60/18-7/5 20/18-21/5 20/54-7/5 20/18-7/15 20/18-35/5 20/90-7/5 20/18-7/25 20/18-49/5 20/18-7/35