-75.24% is the change from 206 to 51
Calculation steps:
[( 51 - 206 ) ÷ 206] x 100 = -75.24%
Formula
Percentage change = [(51 - 206) / 206] x 100
Subtract the new number by the original number
51 - 206 = -155
-155 ÷ 206 = -0.7524271844660194
-0.7524271844660194 x 100 = -75.24%