Effective intereset Quiz on ACCA website

This quiz qestion’s anwer is not clear:

Question:
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Carter’s treasury department is now considering how to best invest a cash surplus. Investment Exe offers interest of 4% per year, compounded semi-annually, for a period of three years. Investment Wye offers one interest payment of 20% at the end of its four-year life.

Which of the two investments gives the higher annual effective interest rate (work to 2 decimal places)?

Select one:
Investment Wye
Investment Exe

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Answer
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Investment Exe annual effective return = 1.022 – 1 = 0.0404 or 4.04%

Investment Wye annual effective return = 41.20 – 1 = 0.0466 or 4.66%

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Where do the numbers in 41.20 – 1 = 0.0466 come from?