-74.5% is the change from 647 to 165
Calculation steps:
[( 165 - 647 ) ÷ 647] x 100 = -74.5%
Formula
Percentage change = [(165 - 647) / 647] x 100
Subtract the new number by the original number
165 - 647 = -482
-482 ÷ 647 = -0.7449768160741885
-0.7449768160741885 x 100 = -74.5%