99.74% is the change from 389 to 777
Calculation steps:
[( 777 - 389 ) ÷ 389] x 100 = 99.74%
Formula
Percentage change = [(777 - 389) / 389] x 100
Subtract the new number by the original number
777 - 389 = 388
388 ÷ 389 = 0.9974293059125964
0.9974293059125964 x 100 = 99.74%