What is the difference between compound and simple interest?
Compound interest takes a percentage of a sum and then adds this onto the total to create a new sum. This means the interest given increases with time as the interest is a percentage of a larger and larger total. Simple interest however is where a percentage is taken of an original sum but further interest given is still calculated from the original amount. This means that the interest given does not change over time as the interest is calculated from the same base sum.