Subtract 21/45 from 14/18
14/18 - 21/45 is 14/45.
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,
14/18 = 14 × 5/18 × 5 = 70/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
21/45 = 21 × 2/45 × 2 = 42/90 - Subtract the two like fractions:
70/90 - 42/90 = 70 - 42/90 = 28/90 - After reducing the fraction, the answer is 14/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 28/18-21/45 14/18-42/45 14/36-21/45 14/18-21/90 42/18-21/45 14/18-63/45 14/54-21/45 70/18-21/45 14/90-21/45 98/18-21/45