-89.51% is the change from 515 to 54
Calculation steps:
[( 54 - 515 ) ÷ 515] x 100 = -89.51%
Formula
Percentage change = [(54 - 515) / 515] x 100
Subtract the new number by the original number
54 - 515 = -461
-461 ÷ 515 = -0.8951456310679612
-0.8951456310679612 x 100 = -89.51%