-75.5% is the change from 649 to 159
Calculation steps:
[( 159 - 649 ) ÷ 649] x 100 = -75.5%
Formula
Percentage change = [(159 - 649) / 649] x 100
Subtract the new number by the original number
159 - 649 = -490
-490 ÷ 649 = -0.7550077041602465
-0.7550077041602465 x 100 = -75.5%