Subtract 18/5 from 7/45
1st number: 7/45, 2nd number: 3 3/5
7/45 - 18/5 is -31/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 5 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 45 × 1 = 45,
7/45 = 7 × 1/45 × 1 = 7/45 - Likewise, for the 2nd fraction, since 5 × 9 = 45,
18/5 = 18 × 9/5 × 9 = 162/45 - Subtract the two like fractions:
7/45 - 162/45 = 7 - 162/45 = -155/45 - After reducing the fraction, the answer is -31/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/45-18/5 7/45-36/5 7/90-18/5 7/45-18/10 21/45-18/5 7/45-54/5 7/45-18/15 35/45-18/5 7/45-90/5 7/45-18/25 49/45-18/5 7/45-18/35