-68.47% is the change from 647 to 204
Calculation steps:
[( 204 - 647 ) ÷ 647] x 100 = -68.47%
Formula
Percentage change = [(204 - 647) / 647] x 100
Subtract the new number by the original number
204 - 647 = -443
-443 ÷ 647 = -0.6846986089644513
-0.6846986089644513 x 100 = -68.47%