Subtract 8/18 from 40/30
1st number: 1 10/30, 2nd number: 8/18
40/30 - 8/18 is 8/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
40/30 = 40 × 3/30 × 3 = 120/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
8/18 = 8 × 5/18 × 5 = 40/90 - Subtract the two like fractions:
120/90 - 40/90 = 120 - 40/90 = 80/90 - After reducing the fraction, the answer is 8/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/30-8/18 40/30-16/18 40/60-8/18 40/30-8/36 40/30-24/18 40/90-8/18 40/30-8/54 40/30-40/18 40/30-8/90 40/30-56/18