Subtract 20/25 from 1/18
1/18 - 20/25 is -67/90.
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,
1/18 = 1 × 25/18 × 25 = 25/450 - Likewise, for the 2nd fraction, since 25 × 18 = 450,
20/25 = 20 × 18/25 × 18 = 360/450 - Subtract the two like fractions:
25/450 - 360/450 = 25 - 360/450 = -335/450 - After reducing the fraction, the answer is -67/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/18-20/25 1/18-40/25 1/36-20/25 1/18-20/50 3/18-20/25 1/18-60/25 1/54-20/25 1/18-20/75 5/18-20/25 1/90-20/25 7/18-20/25