-81.34% is the change from 536 to 100
Calculation steps:
[( 100 - 536 ) ÷ 536] x 100 = -81.34%
Formula
Percentage change = [(100 - 536) / 536] x 100
Subtract the new number by the original number
100 - 536 = -436
-436 ÷ 536 = -0.8134328358208955
-0.8134328358208955 x 100 = -81.34%