-6.78% is the change from 826 to 770
Calculation steps:
[( 770 - 826 ) ÷ 826] x 100 = -6.78%
Formula
Percentage change = [(770 - 826) / 826] x 100
Subtract the new number by the original number
770 - 826 = -56
-56 ÷ 826 = -0.06779661016949153
-0.06779661016949153 x 100 = -6.78%