Subtract 25/90 from 30/12
1st number: 2 6/12, 2nd number: 25/90
30/12 - 25/90 is 20/9.
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,
25/90 = 25 × 2/90 × 2 = 50/180 - Subtract the two like fractions:
450/180 - 50/180 = 450 - 50/180 = 400/180 - After reducing the fraction, the answer is 20/9
- In mixed form: 22/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/12-25/90 30/12-50/90 30/24-25/90 90/12-25/90 30/12-75/90 30/36-25/90 30/60-25/90 30/84-25/90