Subtract 90/45 from 40/12
1st number: 3 4/12, 2nd number: 2 0/45
40/12 - 90/45 is 4/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 12 × 15 = 180,
40/12 = 40 × 15/12 × 15 = 600/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
90/45 = 90 × 4/45 × 4 = 360/180 - Subtract the two like fractions:
600/180 - 360/180 = 600 - 360/180 = 240/180 - After reducing the fraction, the answer is 4/3
- In mixed form: 11/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/12-90/45 40/24-90/45 40/36-90/45 40/60-90/45 40/84-90/45