Subtract 7/90 from 30/12
1st number: 2 6/12, 2nd number: 7/90
30/12 - 7/90 is 109/45.
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,
7/90 = 7 × 2/90 × 2 = 14/180 - Subtract the two like fractions:
450/180 - 14/180 = 450 - 14/180 = 436/180 - After reducing the fraction, the answer is 109/45
- In mixed form: 219/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/12-7/90 30/12-14/90 30/24-7/90 90/12-7/90 30/12-21/90 30/36-7/90 30/12-35/90 30/60-7/90 30/12-49/90 30/84-7/90