-77.33% is the change from 644 to 146
Calculation steps:
[( 146 - 644 ) ÷ 644] x 100 = -77.33%
Formula
Percentage change = [(146 - 644) / 644] x 100
Subtract the new number by the original number
146 - 644 = -498
-498 ÷ 644 = -0.7732919254658385
-0.7732919254658385 x 100 = -77.33%