Subtract 4/90 from 30/12
1st number: 2 6/12, 2nd number: 4/90
30/12 - 4/90 is 221/90.
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,
30/12 = 30 × 15/12 × 15 = 450/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
4/90 = 4 × 2/90 × 2 = 8/180 - Subtract the two like fractions:
450/180 - 8/180 = 450 - 8/180 = 442/180 - After reducing the fraction, the answer is 221/90
- In mixed form: 241/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/12-4/90 30/12-8/90 30/24-4/90 90/12-4/90 30/12-12/90 30/36-4/90 30/12-20/90 30/60-4/90 30/12-28/90 30/84-4/90