-41.56% is the change from 770 to 450
Calculation steps:
[( 450 - 770 ) ÷ 770] x 100 = -41.56%
Formula
Percentage change = [(450 - 770) / 770] x 100
Subtract the new number by the original number
450 - 770 = -320
-320 ÷ 770 = -0.4155844155844156
-0.4155844155844156 x 100 = -41.56%