. Fitness Universe has a membership fee of $50, after which individual visits to the gym are $5.50. Non-members pay $8.00 per visit. Stuart is going to exercise at the gym regularly
and is wondering whether it makes sense to become a member. How regularly would
Stuart need to visit this gym, in order for a membership to be worth it?

We can solve this problem by the rule of three:
1.5 page of Aileen1 page of her friend
x20 pages of her friend

x=(1.5 page of Aileen * 20 pages of her friend) / 1 page of her friend=
=30 pages.

Therefore: Aileen´s mom is not correct, Aileen can read 30 pages if her friend read 20 pages.