Subtract 7/90 from 2/8
2/8 - 7/90 is 31/180.
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,
2/8 = 2 × 45/8 × 45 = 90/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
7/90 = 7 × 4/90 × 4 = 28/360 - Subtract the two like fractions:
90/360 - 28/360 = 90 - 28/360 = 62/360 - After reducing the fraction, the answer is 31/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/8-7/90 2/8-14/90 2/16-7/90 6/8-7/90 2/8-21/90 2/24-7/90 10/8-7/90 2/8-35/90 2/40-7/90 14/8-7/90 2/8-49/90 2/56-7/90