-5.17% is the change from 812 to 770
Calculation steps:
[( 770 - 812 ) ÷ 812] x 100 = -5.17%
Formula
Percentage change = [(770 - 812) / 812] x 100
Subtract the new number by the original number
770 - 812 = -42
-42 ÷ 812 = -0.05172413793103448
-0.05172413793103448 x 100 = -5.17%