If Charlie going at constant rate of 55 miles per hour for 3 hours, then we can just simply multiply the two, so..
55 (3) = 165
Answer: 40%
Step-by-step explanation: twice as more of 20% is 40%
4 out of 5 went to potential members, so 1/5 of the total went to existing members.
(1/5)·215 = 43 . . . . went to existing members
