-75.23% is the change from 642 to 159
Calculation steps:
[( 159 - 642 ) ÷ 642] x 100 = -75.23%
Formula
Percentage change = [(159 - 642) / 642] x 100
Subtract the new number by the original number
159 - 642 = -483
-483 ÷ 642 = -0.7523364485981309
-0.7523364485981309 x 100 = -75.23%