Subtract 12/40 from 36/18
1st number: 2 0/18, 2nd number: 12/40
36/18 - 12/40 is 17/10.
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,
12/40 = 12 × 9/40 × 9 = 108/360 - Subtract the two like fractions:
720/360 - 108/360 = 720 - 108/360 = 612/360 - After reducing the fraction, the answer is 17/10
- In mixed form: 17/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/18-12/40 36/18-24/40 36/18-12/80 36/18-36/40 36/54-12/40 36/18-60/40 36/90-12/40 36/18-84/40