Subtract 40/30 from 90/12
1st number: 7 6/12, 2nd number: 1 10/30
90/12 - 40/30 is 37/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 30 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
90/12 = 90 × 5/12 × 5 = 450/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
40/30 = 40 × 2/30 × 2 = 80/60 - Subtract the two like fractions:
450/60 - 80/60 = 450 - 80/60 = 370/60 - After reducing the fraction, the answer is 37/6
- In mixed form: 61/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12-80/30 90/24-40/30 90/12-40/60 90/36-40/30 90/12-40/90 90/60-40/30 90/84-40/30