Subtract 36/20 from 15/18
1st number: 15/18, 2nd number: 1 16/20
15/18 - 36/20 is -29/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 18 × 10 = 180,
15/18 = 15 × 10/18 × 10 = 150/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
36/20 = 36 × 9/20 × 9 = 324/180 - Subtract the two like fractions:
150/180 - 324/180 = 150 - 324/180 = -174/180 - After reducing the fraction, the answer is -29/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/18-36/20 15/18-72/20 15/36-36/20 15/18-36/40 45/18-36/20 15/54-36/20 15/18-36/60 75/18-36/20 15/90-36/20