Subtract 15/16 from 8/90
8/90 - 15/16 is -611/720.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 16 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 90 × 8 = 720,
8/90 = 8 × 8/90 × 8 = 64/720 - Likewise, for the 2nd fraction, since 16 × 45 = 720,
15/16 = 15 × 45/16 × 45 = 675/720 - Subtract the two like fractions:
64/720 - 675/720 = 64 - 675/720 = -611/720
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/90-15/16 8/90-30/16 8/90-15/32 24/90-15/16 8/90-45/16 8/90-15/48 40/90-15/16 8/90-75/16 8/90-15/80 56/90-15/16