Subtract 45/80 from 15/2
1st number: 7 1/2, 2nd number: 45/80
15/2 - 45/80 is 111/16.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 2 × 40 = 80,
15/2 = 15 × 40/2 × 40 = 600/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
45/80 = 45 × 1/80 × 1 = 45/80 - Subtract the two like fractions:
600/80 - 45/80 = 600 - 45/80 = 555/80 - After reducing the fraction, the answer is 111/16
- In mixed form: 615/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/2-45/80 15/2-90/80 15/4-45/80 45/2-45/80 15/6-45/80 75/2-45/80 15/10-45/80 15/14-45/80