Question

In a sports meet, Sonam's team completes the run at 40 seconds during heat events. On championship day, his team completes the same run at 45 seconds. What is the percentage difference in the completion time from the best completion time? A. 10.5% B. 12.5 % C. 15.5 % D. 20.5 %

Answer 1

Answer: B. 12.5 %

Step-by-step explanation:

GIven: Best completion time = 40 seconds

completion time of other members = 45 seconds

The percentage difference in the completion time from the best completion time =  $\dfrac{difference}{Best\ completeion\ time}\times100$

$=\dfrac{45-40}{40}\times100\%\\=\dfrac{5}{40}\times100\%\\\\=12.5\%$

Hence, the correct option is B. 12.5%.

Answer 2

The percentage difference in the completion time from the best completion time is 12.5%.

What is Percentage?

A percentage is a way to describe a part of a whole. such as the fraction 1/4 can be described as 0.25 which is equal to 25%.

To convert a fraction to a percentage, convert the fraction to decimal form and then multiply by 100 with the '%' symbol.

As it is that Sonam's team completes the run at 40 seconds during heat events while on the championship day, his team completes the same run at 45 seconds. Therefore, the difference can be written as,

$\rm Difference =45\ sec -40\ sec=5\ sec$

Now, as we want to know the percentage difference in the completion time from the best completion time, therefore, we can write,

$\text{Percentage Difference}=\dfrac{\text{Difference}}{\text{Best completion time}} \times 100$

                                  $=\dfrac{5}{40}\times 100\\\\=12.5\%$

Hence, the percentage difference in the completion time from the best completion time is 12.5%.

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