Question

From 2004 to 2014, the amount of money invested in renewable energy worldwide increased from $39.5 billion to $214.4 billion.

Answer 1

The increase in investment dollars for renewable energy was $214.4 billion - $39.5 billion, or $174.9 billion. The percent of increase was 174.9/39.5 = 4.4278, or 442.8%

Answer 2

Take 214.4 and divide by 39.5. You end up with 5.47278487. Since we are talking percent, multiply that answer by 100 and round to the nearest tenth which gives us 542.70 or 542.8%. Pretty sure that is your answer