-97.83% is the change from 507 to 11
Calculation steps:
[( 11 - 507 ) ÷ 507] x 100 = -97.83%
Formula
Percentage change = [(11 - 507) / 507] x 100
Subtract the new number by the original number
11 - 507 = -496
-496 ÷ 507 = -0.9783037475345168
-0.9783037475345168 x 100 = -97.83%