-71.37% is the change from 510 to 146
Calculation steps:
[( 146 - 510 ) ÷ 510] x 100 = -71.37%
Formula
Percentage change = [(146 - 510) / 510] x 100
Subtract the new number by the original number
146 - 510 = -364
-364 ÷ 510 = -0.7137254901960784
-0.7137254901960784 x 100 = -71.37%