-96.65% is the change from 507 to 17
Calculation steps:
[( 17 - 507 ) ÷ 507] x 100 = -96.65%
Formula
Percentage change = [(17 - 507) / 507] x 100
Subtract the new number by the original number
17 - 507 = -490
-490 ÷ 507 = -0.9664694280078896
-0.9664694280078896 x 100 = -96.65%