Subtract 40/45 from 8/16
8/16 - 40/45 is -7/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 45 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 16 × 45 = 720,
8/16 = 8 × 45/16 × 45 = 360/720 - Likewise, for the 2nd fraction, since 45 × 16 = 720,
40/45 = 40 × 16/45 × 16 = 640/720 - Subtract the two like fractions:
360/720 - 640/720 = 360 - 640/720 = -280/720 - After reducing the fraction, the answer is -7/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/16-80/45 8/32-40/45 8/16-40/90 24/16-40/45 8/48-40/45 40/16-40/45 8/80-40/45 56/16-40/45