Subtract 90/12 from 45/3
1st number: 15 0/3, 2nd number: 7 6/12
45/3 - 90/12 is 15/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 12 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 3 × 4 = 12,
45/3 = 45 × 4/3 × 4 = 180/12 - Likewise, for the 2nd fraction, since 12 × 1 = 12,
90/12 = 90 × 1/12 × 1 = 90/12 - Subtract the two like fractions:
180/12 - 90/12 = 180 - 90/12 = 90/12 - After reducing the fraction, the answer is 15/2
- In mixed form: 71/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/3-90/12 45/6-90/12 45/3-90/24 45/9-90/12 45/3-90/36 45/15-90/12 45/3-90/60 45/21-90/12 45/3-90/84