Subtract 40/90 from 12/16
12/16 - 40/90 is 11/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 90 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 16 × 45 = 720,
12/16 = 12 × 45/16 × 45 = 540/720 - Likewise, for the 2nd fraction, since 90 × 8 = 720,
40/90 = 40 × 8/90 × 8 = 320/720 - Subtract the two like fractions:
540/720 - 320/720 = 540 - 320/720 = 220/720 - After reducing the fraction, the answer is 11/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/16-40/90 12/16-80/90 12/32-40/90 36/16-40/90 12/48-40/90 60/16-40/90 12/80-40/90 84/16-40/90