Compound interest vs simple interest
Calculate compound interest growth year by year and compare it with simple interest. Unlimited questions, five difficulty levels, and a full worked solution every time — free.
Try one
$200.00 is invested at 10% per year, compounded annually, for 2 years. What is the balance after 2 years?
A = P · (1 + r)t
Answer: $242.00
See one solved, step by step
$500.00 is invested at 10% per year, compounded annually, for 3 years. What is the balance after 3 years?
A = P · (1 + r)t
📘 Worked solution
1Year by year: year 1: $550, year 2: $605, year 3: $665.5Each year the balance is multiplied by 1.1 — interest earns interest.
2Balance: $665.50That's the compounded total after 3 years.
Ready to master it?
Jump into unlimited practice — your Winny Score tracks you to 100. And if it won't click, a real tutor will make it click: first lesson free.
Start practicing