Subtract 6/40 from 45/18
1st number: 2 9/18, 2nd number: 6/40
45/18 - 6/40 is 47/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 18 × 20 = 360,
45/18 = 45 × 20/18 × 20 = 900/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
6/40 = 6 × 9/40 × 9 = 54/360 - Subtract the two like fractions:
900/360 - 54/360 = 900 - 54/360 = 846/360 - After reducing the fraction, the answer is 47/20
- In mixed form: 27/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/18-6/40 45/18-12/40 45/36-6/40 45/18-6/80 45/18-18/40 45/54-6/40 45/18-30/40 45/90-6/40 45/18-42/40