Subtract 15/90 from 10/12
10/12 - 15/90 is 2/3.
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,
10/12 = 10 × 15/12 × 15 = 150/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
15/90 = 15 × 2/90 × 2 = 30/180 - Subtract the two like fractions:
150/180 - 30/180 = 150 - 30/180 = 120/180 - After reducing the fraction, the answer is 2/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/12-15/90 10/12-30/90 10/24-15/90 30/12-15/90 10/12-45/90 10/36-15/90 50/12-15/90 10/12-75/90 10/60-15/90 70/12-15/90 10/84-15/90