I used my credit card to buy furniture for a relative. He was supposed to pay on time to avoid paying the interest rate but did not. He has a balance of $800 and interest rate on my credit card is 19.99%. How much interest is he supposed to pay on the $800. thanks

high school maths

It amazes me how stupid some ppl really are "high school math" it would have taken a lesser time to just answer the question. Shameful

so am silly ?you are a big fool

Won't stoop to ur level. Pls kindly move on to something else and let someone who really knows the answer do the maths. Thanks

That depends on whether the interest rate charge is flat or per annum.

For flat, 19.99% of $800 is $159.92

For per annum, further divide the $159.92 by 12 months and you get $13.36

If your card is provided by a Bank, its more likely that you are charged per annum.

Thank you. That was the confusion. Really appreciate