You know the same details with an IRR and you can solve for the NPV expressed as a percentage return ... The Excel formula ...

So, 22 times 20 and then the percentage button, 4.4, so £4.40. Ok, so final part, 22 take away the £4.40 discount makes £17.60. Speaker 1: Yeah that was faster, I'll use a calculator next time.

The formula for calculating savings account interest uses ... The interest rate for a credit card is expressed as annual percentage rate. You can figure out the DPR by dividing the APR by 360 ...