Subtract 5/40 from 36/18
1st number: 2 0/18, 2nd number: 5/40
36/18 - 5/40 is 15/8.
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,
36/18 = 36 × 20/18 × 20 = 720/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
5/40 = 5 × 9/40 × 9 = 45/360 - Subtract the two like fractions:
720/360 - 45/360 = 720 - 45/360 = 675/360 - After reducing the fraction, the answer is 15/8
- In mixed form: 17/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/18-5/40 36/18-10/40 36/18-5/80 36/18-15/40 36/54-5/40 36/18-25/40 36/90-5/40 36/18-35/40