Subtract 12/80 from 16/90
16/90 - 12/80 is 1/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 90 × 8 = 720,
16/90 = 16 × 8/90 × 8 = 128/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
12/80 = 12 × 9/80 × 9 = 108/720 - Subtract the two like fractions:
128/720 - 108/720 = 128 - 108/720 = 20/720 - After reducing the fraction, the answer is 1/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/90-12/80 16/90-24/80 48/90-12/80 16/90-36/80 80/90-12/80 16/90-60/80 16/90-84/80