Answer:
The second club has a better deal for 6 months.
Explanation:
First you figure out the cost for the first club by multiplying 30 by 6 = 180 dollars for 6 months.
Next you can calculate how much it would cost for the second club. If it is 145 dollars for 5 months, then you divide 145 by 5 and get 29 which is your conversion factor. Then multiply your conversion factor by the number of months, which is 6 in this case, to get your month cost.
Just by seeing 6x29 you see that it is less than 6x30 by 6 so you have your answer. The second club is better to join for six months