Câu hỏi

The GDP of a country has decreased by 39% over the past 5 years and is now 378 billion. What was the GDP S years ago? 272 billion None of the other answers are correct 619 billion 620 billion
Giải pháp
4.4(315 phiếu bầu)

Thủychuyên gia · Hướng dẫn 6 năm
Trả lời
Let the GDP 5 years ago be $x$. The GDP decreased by 39%, meaning the current GDP is 61% (100% - 39%) of the GDP 5 years ago. Therefore, we can set up the equation:<br /><br />0.61x = 378 billion<br /><br />Solving for x:<br /><br />x = 378 billion / 0.61 ≈ 620 billion<br /><br />Therefore, the GDP 5 years ago was approximately 620 billion.<br />