Subtract 45/12 from 8/45
1st number: 8/45, 2nd number: 3 9/12
8/45 - 45/12 is -643/180.
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,
8/45 = 8 × 4/45 × 4 = 32/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
45/12 = 45 × 15/12 × 15 = 675/180 - Subtract the two like fractions:
32/180 - 675/180 = 32 - 675/180 = -643/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/45-45/12 8/45-90/12 8/90-45/12 8/45-45/24 24/45-45/12 8/45-45/36 40/45-45/12 8/45-45/60 56/45-45/12 8/45-45/84