Subtract 15/40 from 15/2
1st number: 7 1/2, 2nd number: 15/40
15/2 - 15/40 is 57/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 2 × 20 = 40,
15/2 = 15 × 20/2 × 20 = 300/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
15/40 = 15 × 1/40 × 1 = 15/40 - Subtract the two like fractions:
300/40 - 15/40 = 300 - 15/40 = 285/40 - After reducing the fraction, the answer is 57/8
- In mixed form: 71/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/2-15/40 15/2-30/40 15/4-15/40 15/2-15/80 45/2-15/40 15/2-45/40 15/6-15/40 75/2-15/40 15/2-75/40 15/10-15/40 15/14-15/40