-89.51% is the change from 486 to 51
Calculation steps:
[( 51 - 486 ) ÷ 486] x 100 = -89.51%
Formula
Percentage change = [(51 - 486) / 486] x 100
Subtract the new number by the original number
51 - 486 = -435
-435 ÷ 486 = -0.8950617283950617
-0.8950617283950617 x 100 = -89.51%