-71.23% is the change from 511 to 147
Calculation steps:
[( 147 - 511 ) ÷ 511] x 100 = -71.23%
Formula
Percentage change = [(147 - 511) / 511] x 100
Subtract the new number by the original number
147 - 511 = -364
-364 ÷ 511 = -0.7123287671232876
-0.7123287671232876 x 100 = -71.23%