-76.12% is the change from 645 to 154
Calculation steps:
[( 154 - 645 ) ÷ 645] x 100 = -76.12%
Formula
Percentage change = [(154 - 645) / 645] x 100
Subtract the new number by the original number
154 - 645 = -491
-491 ÷ 645 = -0.7612403100775194
-0.7612403100775194 x 100 = -76.12%