Answer:
28 members
Step-by-step explanation:
If there is a decrease of 65% , it means that 100%−65%=35% of the members are left.
So we just need to find 35% of 80.
35100×80=28 members.
The other way is to find the actual decrease, which is:
65100×80=52 members
80−52=28 members remain.