-77.67% is the change from 645 to 144
Calculation steps:
[( 144 - 645 ) ÷ 645] x 100 = -77.67%
Formula
Percentage change = [(144 - 645) / 645] x 100
Subtract the new number by the original number
144 - 645 = -501
-501 ÷ 645 = -0.7767441860465116
-0.7767441860465116 x 100 = -77.67%