Interest on a credit card balance

[robgti]

I recently borrowed £850 off my partner which she put on her credit card.

I borrowed the money on the 24/02/2014 and paid back £325 on the 28/02/2014.

I will be paying back £175 at the end of each month until the balance is clear then paying a 1 off payment for the interest.

Can any one tell me roughly what interest I will owe when the APR is 39.9%?

 

[robgti]

That is great thank you everyone.

 

[robgti]

Trust me it is the last time I am doing this.