Subtract 8/15 from 1/90
1/90 - 8/15 is -47/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 15 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 15 × 6 = 90,
8/15 = 8 × 6/15 × 6 = 48/90 - Subtract the two like fractions:
1/90 - 48/90 = 1 - 48/90 = -47/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/90-8/15 1/90-16/15 1/90-8/30 3/90-8/15 1/90-24/15 1/90-8/45 5/90-8/15 1/90-40/15 1/90-8/75 7/90-8/15 1/90-56/15