Bob wants to run a mile in the same time as his sister. If Bob’s time for a mile is currently 10 minutes and his sister’s time is currently 8 minutes 48 seconds, by what percent does Bob need to improve his time in order run a mile in the same time as his sister?	Choose the correct choice from the following answers:
A) 3%	B) 5%	C) 8%x	D) 10%	E) 12%
Bob's time = 600 secs.   His sis' time = 528 secs.   Percent increase needed = (600-528/600) * 100 = 72/600 * 100= 
<gadget id="calculator">72/600 * 100</gadget>
<output>12</output>
12%. Ans (12%).
<result>E</result>
Bob wants to run a mile in the same time as his sister. If Bob’s time for a mile is currently 10 minutes and his sister’s time is currently 8 minutes 48 seconds, by what percent does Bob need to improve his time in order run a mile in the same time as his sister?