Subtract 15/14 from 18/45
1st number: 18/45, 2nd number: 1 1/14
18/45 - 15/14 is -47/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 14 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
18/45 = 18 × 14/45 × 14 = 252/630 - Likewise, for the 2nd fraction, since 14 × 45 = 630,
15/14 = 15 × 45/14 × 45 = 675/630 - Subtract the two like fractions:
252/630 - 675/630 = 252 - 675/630 = -423/630 - After reducing the fraction, the answer is -47/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/45-15/14 18/45-30/14 18/90-15/14 18/45-15/28 54/45-15/14 18/45-45/14 18/45-15/42 90/45-15/14 18/45-75/14 18/45-15/70 18/45-15/98