Subtract 12/45 from 9/80
9/80 - 12/45 is -37/240.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 45 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
9/80 = 9 × 9/80 × 9 = 81/720 - Likewise, for the 2nd fraction, since 45 × 16 = 720,
12/45 = 12 × 16/45 × 16 = 192/720 - Subtract the two like fractions:
81/720 - 192/720 = 81 - 192/720 = -111/720 - After reducing the fraction, the answer is -37/240
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/80-12/45 9/80-24/45 9/80-12/90 27/80-12/45 9/80-36/45 45/80-12/45 9/80-60/45 63/80-12/45 9/80-84/45