Answer: B. 33%
Step-by-step explanation:
- In Mathematics , a percentage is basically a process of dividing the numerator by the denominator , then multiply the answer by 100.
We use Mathematical Formula : 
Since , Difference between the Weight of 0.20 and Weight of 0.15 = 0.20-0.15=0.05
Then, substitute the value in formula , we get

Hence, the weight of 0.20 is 33% more important than a weight of 0.15.