Do anyone know this?

Mr. and mrs. wallace have decided to buy a car for $21,600. they finance $15,000 of it with a 5-year auto loan at 2.9% arp. what will be their monthly payment be? a. $268.20 b. $268.86 c. $269.54 d. $387.16 (monthly car loan payment per $1,000 borrowed) i need !

I’m still confused on how to work the percentages

The candy store is having a 30% off sale. emma is going to buy $7.50 worth of candy.how much will she pay after the discount