Subtract 10/90 from 7/8
7/8 - 10/90 is 55/72.
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,
10/90 = 10 × 4/90 × 4 = 40/360 - Subtract the two like fractions:
315/360 - 40/360 = 315 - 40/360 = 275/360 - After reducing the fraction, the answer is 55/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/8-10/90 7/8-20/90 7/16-10/90 21/8-10/90 7/8-30/90 7/24-10/90 35/8-10/90 7/8-50/90 7/40-10/90 49/8-10/90 7/8-70/90 7/56-10/90