Question

Your job pays you $1600 per month. All taxes combined reduce your pay by 25%. Your current expenses are $1200 per month. You want to join a health club for $75 per month. Can you afford it?

Answer 1

No, you cannot.
25% of 1600 is 400
1600-400=1200

when you take your remaining income and subtract your expenses, you are left with no left over money.