Subtract 1/8 from 1/90
1/90 - 1/8 is -41/360.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 8 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
1/90 = 1 × 4/90 × 4 = 4/360 - Likewise, for the 2nd fraction, since 8 × 45 = 360,
1/8 = 1 × 45/8 × 45 = 45/360 - Subtract the two like fractions:
4/360 - 45/360 = 4 - 45/360 = -41/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/90-1/8 1/90-2/8 1/90-1/16 3/90-1/8 1/90-3/8 1/90-1/24 5/90-1/8 1/90-5/8 1/90-1/40 7/90-1/8 1/90-7/8 1/90-1/56