Subtract 15/40 from 30/2
1st number: 15 0/2, 2nd number: 15/40
30/2 - 15/40 is 117/8.
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,
30/2 = 30 × 20/2 × 20 = 600/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
15/40 = 15 × 1/40 × 1 = 15/40 - Subtract the two like fractions:
600/40 - 15/40 = 600 - 15/40 = 585/40 - After reducing the fraction, the answer is 117/8
- In mixed form: 145/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/2-15/40 30/2-30/40 30/4-15/40 30/2-15/80 90/2-15/40 30/2-45/40 30/6-15/40 30/2-75/40 30/10-15/40 30/14-15/40