-32.09% is the change from 642 to 436
Calculation steps:
[( 436 - 642 ) ÷ 642] x 100 = -32.09%
Formula
Percentage change = [(436 - 642) / 642] x 100
Subtract the new number by the original number
436 - 642 = -206
-206 ÷ 642 = -0.32087227414330216
-0.32087227414330216 x 100 = -32.09%