-38.3% is the change from 812 to 501
Calculation steps:
[( 501 - 812 ) ÷ 812] x 100 = -38.3%
Formula
Percentage change = [(501 - 812) / 812] x 100
Subtract the new number by the original number
501 - 812 = -311
-311 ÷ 812 = -0.3830049261083744
-0.3830049261083744 x 100 = -38.3%