Subtract 3/18 from 1/90
1/90 - 3/18 is -7/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
1/90 = 1 × 1/90 × 1 = 1/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
3/18 = 3 × 5/18 × 5 = 15/90 - Subtract the two like fractions:
1/90 - 15/90 = 1 - 15/90 = -14/90 - After reducing the fraction, the answer is -7/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/90-3/18 1/90-6/18 1/90-3/36 3/90-3/18 1/90-9/18 1/90-3/54 5/90-3/18 1/90-15/18 1/90-3/90 7/90-3/18 1/90-21/18