-23.65% is the change from 812 to 620
Calculation steps:
[( 620 - 812 ) ÷ 812] x 100 = -23.65%
Formula
Percentage change = [(620 - 812) / 812] x 100
Subtract the new number by the original number
620 - 812 = -192
-192 ÷ 812 = -0.23645320197044334
-0.23645320197044334 x 100 = -23.65%