-3.9% is the change from 770 to 740
Calculation steps:
[( 740 - 770 ) ÷ 770] x 100 = -3.9%
Formula
Percentage change = [(740 - 770) / 770] x 100
Subtract the new number by the original number
740 - 770 = -30
-30 ÷ 770 = -0.03896103896103896
-0.03896103896103896 x 100 = -3.9%