Subtract 45/12 from 90/2
1st number: 45 0/2, 2nd number: 3 9/12
90/2 - 45/12 is 165/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 12 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 2 × 6 = 12,
90/2 = 90 × 6/2 × 6 = 540/12 - Likewise, for the 2nd fraction, since 12 × 1 = 12,
45/12 = 45 × 1/12 × 1 = 45/12 - Subtract the two like fractions:
540/12 - 45/12 = 540 - 45/12 = 495/12 - After reducing the fraction, the answer is 165/4
- In mixed form: 411/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/2-90/12 90/4-45/12 90/2-45/24 90/6-45/12 90/2-45/36 90/10-45/12 90/2-45/60 90/14-45/12 90/2-45/84