-81.11% is the change from 180 to 34
Calculation steps:
[( 34 - 180 ) ÷ 180] x 100 = -81.11%
Formula
Percentage change = [(34 - 180) / 180] x 100
Subtract the new number by the original number
34 - 180 = -146
-146 ÷ 180 = -0.8111111111111111
-0.8111111111111111 x 100 = -81.11%