Subtract 15/90 from 1/5
1/5 - 15/90 is 1/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 5 × 18 = 90,
1/5 = 1 × 18/5 × 18 = 18/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
15/90 = 15 × 1/90 × 1 = 15/90 - Subtract the two like fractions:
18/90 - 15/90 = 18 - 15/90 = 3/90 - After reducing the fraction, the answer is 1/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/5-15/90 1/5-30/90 1/10-15/90 3/5-15/90 1/5-45/90 1/15-15/90 1/5-75/90 1/25-15/90 7/5-15/90 1/35-15/90