Subtract 15/90 from 15/2
1st number: 7 1/2, 2nd number: 15/90
15/2 - 15/90 is 22/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 2 × 45 = 90,
15/2 = 15 × 45/2 × 45 = 675/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
15/90 = 15 × 1/90 × 1 = 15/90 - Subtract the two like fractions:
675/90 - 15/90 = 675 - 15/90 = 660/90 - After reducing the fraction, the answer is 22/3
- In mixed form: 71/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/2-15/90 15/2-30/90 15/4-15/90 45/2-15/90 15/2-45/90 15/6-15/90 75/2-15/90 15/2-75/90 15/10-15/90 15/14-15/90