-53.9% is the change from 770 to 355
Calculation steps:
[( 355 - 770 ) ÷ 770] x 100 = -53.9%
Formula
Percentage change = [(355 - 770) / 770] x 100
Subtract the new number by the original number
355 - 770 = -415
-415 ÷ 770 = -0.538961038961039
-0.538961038961039 x 100 = -53.9%