-50.06% is the change from 777 to 388
Calculation steps:
[( 388 - 777 ) ÷ 777] x 100 = -50.06%
Formula
Percentage change = [(388 - 777) / 777] x 100
Subtract the new number by the original number
388 - 777 = -389
-389 ÷ 777 = -0.5006435006435006
-0.5006435006435006 x 100 = -50.06%