-98.65% is the change from 518 to 7
Calculation steps:
[( 7 - 518 ) ÷ 518] x 100 = -98.65%
Formula
Percentage change = [(7 - 518) / 518] x 100
Subtract the new number by the original number
7 - 518 = -511
-511 ÷ 518 = -0.9864864864864865
-0.9864864864864865 x 100 = -98.65%