-99.01% is the change from 507 to 5
Calculation steps:
[( 5 - 507 ) ÷ 507] x 100 = -99.01%
Formula
Percentage change = [(5 - 507) / 507] x 100
Subtract the new number by the original number
5 - 507 = -502
-502 ÷ 507 = -0.9901380670611439
-0.9901380670611439 x 100 = -99.01%