Subtract 8/18 from 4/5
4/5 - 8/18 is 16/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 5 × 18 = 90,
4/5 = 4 × 18/5 × 18 = 72/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
8/18 = 8 × 5/18 × 5 = 40/90 - Subtract the two like fractions:
72/90 - 40/90 = 72 - 40/90 = 32/90 - After reducing the fraction, the answer is 16/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/5-8/18 4/5-16/18 4/10-8/18 4/5-8/36 12/5-8/18 4/5-24/18 4/15-8/18 4/5-8/54 20/5-8/18 4/5-40/18 4/25-8/18 4/5-8/90 28/5-8/18 4/5-56/18 4/35-8/18