39.75% is the change from 556 to 777
Calculation steps:
[( 777 - 556 ) ÷ 556] x 100 = 39.75%
Formula
Percentage change = [(777 - 556) / 556] x 100
Subtract the new number by the original number
777 - 556 = 221
221 ÷ 556 = 0.39748201438848924
0.39748201438848924 x 100 = 39.75%