-96.49% is the change from 513 to 18
Calculation steps:
[( 18 - 513 ) ÷ 513] x 100 = -96.49%
Formula
Percentage change = [(18 - 513) / 513] x 100
Subtract the new number by the original number
18 - 513 = -495
-495 ÷ 513 = -0.9649122807017544
-0.9649122807017544 x 100 = -96.49%