Subtract 54/90 from 40/12
1st number: 3 4/12, 2nd number: 54/90
40/12 - 54/90 is 41/15.
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,
54/90 = 54 × 2/90 × 2 = 108/180 - Subtract the two like fractions:
600/180 - 108/180 = 600 - 108/180 = 492/180 - After reducing the fraction, the answer is 41/15
- In mixed form: 211/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/12-54/90 40/24-54/90 40/36-54/90 40/60-54/90 40/84-54/90