Subtract 15/18 from 36/45
36/45 - 15/18 is -1/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
36/45 = 36 × 2/45 × 2 = 72/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
15/18 = 15 × 5/18 × 5 = 75/90 - Subtract the two like fractions:
72/90 - 75/90 = 72 - 75/90 = -3/90 - After reducing the fraction, the answer is -1/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/45-15/18 36/45-30/18 36/90-15/18 36/45-15/36 36/45-45/18 36/45-15/54 36/45-75/18 36/45-15/90