-66.03% is the change from 209 to 71
Calculation steps:
[( 71 - 209 ) ÷ 209] x 100 = -66.03%
Formula
Percentage change = [(71 - 209) / 209] x 100
Subtract the new number by the original number
71 - 209 = -138
-138 ÷ 209 = -0.6602870813397129
-0.6602870813397129 x 100 = -66.03%