-23.49% is the change from 647 to 495
Calculation steps:
[( 495 - 647 ) ÷ 647] x 100 = -23.49%
Formula
Percentage change = [(495 - 647) / 647] x 100
Subtract the new number by the original number
495 - 647 = -152
-152 ÷ 647 = -0.23493044822256567
-0.23493044822256567 x 100 = -23.49%