-30.69% is the change from 642 to 445
Calculation steps:
[( 445 - 642 ) ÷ 642] x 100 = -30.69%
Formula
Percentage change = [(445 - 642) / 642] x 100
Subtract the new number by the original number
445 - 642 = -197
-197 ÷ 642 = -0.3068535825545171
-0.3068535825545171 x 100 = -30.69%