Calculating a 12.99% APR on a Balance of $21.00

If you have a 12.99% APR (Annual Percentage Rate) on a balance of $21.00 then you will be spending $0.01 per day, $0.22 per month, and $2.73 per year on interest.

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Balance $
APR (%)  
Days in Month  
Days in Year  
Interest Per Day $
Interest Per Month $
Interest Per Year $