-97.26% is the change from 511 to 14
Calculation steps:
[( 14 - 511 ) ÷ 511] x 100 = -97.26%
Formula
Percentage change = [(14 - 511) / 511] x 100
Subtract the new number by the original number
14 - 511 = -497
-497 ÷ 511 = -0.9726027397260274
-0.9726027397260274 x 100 = -97.26%