-55.45% is the change from 642 to 286
Calculation steps:
[( 286 - 642 ) ÷ 642] x 100 = -55.45%
Formula
Percentage change = [(286 - 642) / 642] x 100
Subtract the new number by the original number
286 - 642 = -356
-356 ÷ 642 = -0.5545171339563862
-0.5545171339563862 x 100 = -55.45%