Subtract 3/90 from 40/12
1st number: 3 4/12, 2nd number: 3/90
40/12 - 3/90 is 33/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 90 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 90 × 2 = 180,
3/90 = 3 × 2/90 × 2 = 6/180 - Subtract the two like fractions:
600/180 - 6/180 = 600 - 6/180 = 594/180 - After reducing the fraction, the answer is 33/10
- In mixed form: 33/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/12-3/90 40/12-6/90 40/24-3/90 40/12-9/90 40/36-3/90 40/12-15/90 40/60-3/90 40/12-21/90 40/84-3/90