-81.48% is the change from 162 to 30
Calculation steps:
[( 30 - 162 ) ÷ 162] x 100 = -81.48%
Formula
Percentage change = [(30 - 162) / 162] x 100
Subtract the new number by the original number
30 - 162 = -132
-132 ÷ 162 = -0.8148148148148148
-0.8148148148148148 x 100 = -81.48%