-80.86% is the change from 209 to 40
Calculation steps:
[( 40 - 209 ) ÷ 209] x 100 = -80.86%
Formula
Percentage change = [(40 - 209) / 209] x 100
Subtract the new number by the original number
40 - 209 = -169
-169 ÷ 209 = -0.8086124401913876
-0.8086124401913876 x 100 = -80.86%