-37.19% is the change from 812 to 510
Calculation steps:
[( 510 - 812 ) ÷ 812] x 100 = -37.19%
Formula
Percentage change = [(510 - 812) / 812] x 100
Subtract the new number by the original number
510 - 812 = -302
-302 ÷ 812 = -0.37192118226600984
-0.37192118226600984 x 100 = -37.19%