Answer the question, I don't understand

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?

At the beginning of year 1, carlos invests $600 at an annual compound interest rate of 4%. he makes no deposits to or withdrawals from the account. which explicit formula can be used to find the account's balance at the beginning of year 5? what is, the balance?

What is 1.5% of 120 or what number is 1.5% of 120