-98.64% is the change from 513 to 7
Calculation steps:
[( 7 - 513 ) ÷ 513] x 100 = -98.64%
Formula
Percentage change = [(7 - 513) / 513] x 100
Subtract the new number by the original number
7 - 513 = -506
-506 ÷ 513 = -0.98635477582846
-0.98635477582846 x 100 = -98.64%