Subtract 21/18 from 40/2
1st number: 20 0/2, 2nd number: 1 3/18
40/2 - 21/18 is 113/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 18 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 2 × 9 = 18,
40/2 = 40 × 9/2 × 9 = 360/18 - Likewise, for the 2nd fraction, since 18 × 1 = 18,
21/18 = 21 × 1/18 × 1 = 21/18 - Subtract the two like fractions:
360/18 - 21/18 = 360 - 21/18 = 339/18 - After reducing the fraction, the answer is 113/6
- In mixed form: 185/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/2-21/18 40/2-42/18 40/4-21/18 40/2-21/36 40/2-63/18 40/6-21/18 40/2-21/54 40/10-21/18 40/2-21/90 40/14-21/18