Subtract 7/90 from 7/8
7/8 - 7/90 is 287/360.
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,
7/8 = 7 × 45/8 × 45 = 315/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
7/90 = 7 × 4/90 × 4 = 28/360 - Subtract the two like fractions:
315/360 - 28/360 = 315 - 28/360 = 287/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/8-7/90 7/8-14/90 7/16-7/90 21/8-7/90 7/8-21/90 7/24-7/90 35/8-7/90 7/8-35/90 7/40-7/90 49/8-7/90 7/8-49/90 7/56-7/90