-16.51% is the change from 642 to 536
Calculation steps:
[( 536 - 642 ) ÷ 642] x 100 = -16.51%
Formula
Percentage change = [(536 - 642) / 642] x 100
Subtract the new number by the original number
536 - 642 = -106
-106 ÷ 642 = -0.16510903426791276
-0.16510903426791276 x 100 = -16.51%