-94.51% is the change from 510 to 28
Calculation steps:
[( 28 - 510 ) ÷ 510] x 100 = -94.51%
Formula
Percentage change = [(28 - 510) / 510] x 100
Subtract the new number by the original number
28 - 510 = -482
-482 ÷ 510 = -0.9450980392156862
-0.9450980392156862 x 100 = -94.51%