Subtract 12/90 from 40/3
1st number: 13 1/3, 2nd number: 12/90
40/3 - 12/90 is 66/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 3 × 30 = 90,
40/3 = 40 × 30/3 × 30 = 1200/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
12/90 = 12 × 1/90 × 1 = 12/90 - Subtract the two like fractions:
1200/90 - 12/90 = 1200 - 12/90 = 1188/90 - After reducing the fraction, the answer is 66/5
- In mixed form: 131/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/3-12/90 40/3-24/90 40/6-12/90 40/3-36/90 40/9-12/90 40/3-60/90 40/15-12/90 40/3-84/90 40/21-12/90