Subtract 15/25 from 7/18
7/18 - 15/25 is -19/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 25 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 18 × 25 = 450,
7/18 = 7 × 25/18 × 25 = 175/450 - Likewise, for the 2nd fraction, since 25 × 18 = 450,
15/25 = 15 × 18/25 × 18 = 270/450 - Subtract the two like fractions:
175/450 - 270/450 = 175 - 270/450 = -95/450 - After reducing the fraction, the answer is -19/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/18-15/25 7/18-30/25 7/36-15/25 7/18-15/50 21/18-15/25 7/18-45/25 7/54-15/25 7/18-15/75 35/18-15/25 7/18-75/25 7/90-15/25 49/18-15/25