Effective Interest Rate from bifurcated interest rate
If the APR is an effective rate. If the APR is a nominal rate compounded monthly, first convert it to an effective rate.
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Effective Interest Rate from bifurcated interest rate

### Response:
If the APR is an effective rate. If the APR is a nominal rate compounded monthly, first convert it to an effective rate.