-83.5% is the change from 206 to 34
Calculation steps:
[( 34 - 206 ) ÷ 206] x 100 = -83.5%
Formula
Percentage change = [(34 - 206) / 206] x 100
Subtract the new number by the original number
34 - 206 = -172
-172 ÷ 206 = -0.8349514563106796
-0.8349514563106796 x 100 = -83.5%