-98.65% is the change from 517 to 7
Calculation steps:
[( 7 - 517 ) ÷ 517] x 100 = -98.65%
Formula
Percentage change = [(7 - 517) / 517] x 100
Subtract the new number by the original number
7 - 517 = -510
-510 ÷ 517 = -0.9864603481624759
-0.9864603481624759 x 100 = -98.65%