Question

In June a runner ran a mile in 7:45. In September the runner ran a mile in 5:51 what is the percent of change

Answer 1

Answer:

the percent of change is $32.48\%$

Step-by-step explanation:

Step 1

Convert the time in seconds

$7:45=7*60+45=465\ sec$

$5:51=5*60+51=351\ sec$

we know that

$351\ sec$ ----> represent the $100\%$

Step 2

the change of the time is equal to

$465\ sec-351\ sec=114\ sec$

Step 3

by proportion

find the percent of change

$\frac{100}{351}=\frac{x}{114} \\ \\x=114*100/351\\ \\x=32.48\%$

Answer 2

Answer:

24.52%

Step-by-step explanation:

I took the test, and got it right.