PLS HELP

Florida's minimum wage in 2020 is $8.56 per hour. In 2021, the minimum wage will be $10 per hour. What is the percent change in the minimum wage?

Ben deposited $650 from his pressure washing business into a savings account. The simple interest rate paid by the bank is 3.5%. If Ben makes no deposits or withdrawals, how much interest will he earn in 4 years?