Subtract 15/45 from 16/18
16/18 - 15/45 is 5/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
16/18 = 16 × 5/18 × 5 = 80/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
15/45 = 15 × 2/45 × 2 = 30/90 - Subtract the two like fractions:
80/90 - 30/90 = 80 - 30/90 = 50/90 - After reducing the fraction, the answer is 5/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/18-15/45 16/18-30/45 16/36-15/45 16/18-15/90 48/18-15/45 16/54-15/45 80/18-15/45 16/18-75/45 16/90-15/45