Subtract 18/90 from 6/8
6/8 - 18/90 is 11/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 8 × 45 = 360,
6/8 = 6 × 45/8 × 45 = 270/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
18/90 = 18 × 4/90 × 4 = 72/360 - Subtract the two like fractions:
270/360 - 72/360 = 270 - 72/360 = 198/360 - After reducing the fraction, the answer is 11/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/8-18/90 6/8-36/90 6/16-18/90 18/8-18/90 6/8-54/90 6/24-18/90 30/8-18/90 6/40-18/90 42/8-18/90 6/56-18/90