Subtract 40/12 from 9/45
1st number: 9/45, 2nd number: 3 4/12
9/45 - 40/12 is -47/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 12 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
9/45 = 9 × 4/45 × 4 = 36/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
40/12 = 40 × 15/12 × 15 = 600/180 - Subtract the two like fractions:
36/180 - 600/180 = 36 - 600/180 = -564/180 - After reducing the fraction, the answer is -47/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/45-40/12 9/45-80/12 9/90-40/12 9/45-40/24 27/45-40/12 9/45-40/36 9/45-40/60 63/45-40/12 9/45-40/84