-55.97% is the change from 770 to 339
Calculation steps:
[( 339 - 770 ) ÷ 770] x 100 = -55.97%
Formula
Percentage change = [(339 - 770) / 770] x 100
Subtract the new number by the original number
339 - 770 = -431
-431 ÷ 770 = -0.5597402597402598
-0.5597402597402598 x 100 = -55.97%