-8.11% is the change from 838 to 770
Calculation steps:
[( 770 - 838 ) ÷ 838] x 100 = -8.11%
Formula
Percentage change = [(770 - 838) / 838] x 100
Subtract the new number by the original number
770 - 838 = -68
-68 ÷ 838 = -0.081145584725537
-0.081145584725537 x 100 = -8.11%