-68.54% is the change from 642 to 202
Calculation steps:
[( 202 - 642 ) ÷ 642] x 100 = -68.54%
Formula
Percentage change = [(202 - 642) / 642] x 100
Subtract the new number by the original number
202 - 642 = -440
-440 ÷ 642 = -0.6853582554517134
-0.6853582554517134 x 100 = -68.54%