To calculate the percent change in renewable energy investment in the US from 2005 to 2018, you can use the following formula:
Percent change = ((Final value - Initial value) / Initial value) * 100%
In this case, the initial value is $11.4 billion in 2005 and the final value is $46.5 billion in 2018. Plugging these values into the formula, we get:
Percent change = (($46.5 billion - $11.4 billion) / $11.4 billion) * 100%
= ($35.1 billion / $11.4 billion) * 100%
= 3.085 * 100%
= 308.5%
So, the percent change in renewable energy investment in the US from 2005 to 2018 was 308.5%, a substantial increase over the 13-year period.