Subtract 10/18 from 7/45
7/45 - 10/18 is -2/5.
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,
7/45 = 7 × 2/45 × 2 = 14/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
10/18 = 10 × 5/18 × 5 = 50/90 - Subtract the two like fractions:
14/90 - 50/90 = 14 - 50/90 = -36/90 - After reducing the fraction, the answer is -2/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/45-10/18 7/45-20/18 7/90-10/18 7/45-10/36 21/45-10/18 7/45-30/18 7/45-10/54 35/45-10/18 7/45-50/18 7/45-10/90 49/45-10/18 7/45-70/18