-9.76% is the change from 820 to 740
Calculation steps:
[( 740 - 820 ) ÷ 820] x 100 = -9.76%
Formula
Percentage change = [(740 - 820) / 820] x 100
Subtract the new number by the original number
740 - 820 = -80
-80 ÷ 820 = -0.0975609756097561
-0.0975609756097561 x 100 = -9.76%