-7.74% is the change from 840 to 775
Calculation steps:
[( 775 - 840 ) ÷ 840] x 100 = -7.74%
Formula
Percentage change = [(775 - 840) / 840] x 100
Subtract the new number by the original number
775 - 840 = -65
-65 ÷ 840 = -0.07738095238095238
-0.07738095238095238 x 100 = -7.74%