Subtract 9/8 from 10/90
1st number: 10/90, 2nd number: 1 1/8
10/90 - 9/8 is -73/72.
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,
10/90 = 10 × 4/90 × 4 = 40/360 - Likewise, for the 2nd fraction, since 8 × 45 = 360,
9/8 = 9 × 45/8 × 45 = 405/360 - Subtract the two like fractions:
40/360 - 405/360 = 40 - 405/360 = -365/360 - After reducing the fraction, the answer is -73/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/90-9/8 10/90-18/8 10/90-9/16 30/90-9/8 10/90-27/8 10/90-9/24 50/90-9/8 10/90-45/8 10/90-9/40 70/90-9/8 10/90-63/8 10/90-9/56