In 1979, the estimated elephant population was 1.3 million and in 2007 it was 640,000. By approximately what percentage did the elephant population decline over this time period?

Question

 In 1979, the estimated elephant population was 1.3 million and in 2007 it was 640,000. By approximately what percentage did the elephant population decline over this time period? (Show your work.) How does this compare to the change in range over this same time period?

Answer 1

Percent decrease - original amount - decreased amount ÷ original amount = .__ x100 = %

1,300,000 - 640,000 = 660,000 ÷ 1,300,000 = 0.5077 x 100 = 50.77%