Subtract 14/18 from 42/45
42/45 - 14/18 is 7/45.
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,
42/45 = 42 × 2/45 × 2 = 84/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
14/18 = 14 × 5/18 × 5 = 70/90 - Subtract the two like fractions:
84/90 - 70/90 = 84 - 70/90 = 14/90 - After reducing the fraction, the answer is 7/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/45-14/18 42/45-28/18 42/90-14/18 42/45-14/36 42/45-42/18 42/45-14/54 42/45-70/18 42/45-14/90 42/45-98/18