40% is the change from 555 to 777
Calculation steps:
[( 777 - 555 ) ÷ 555] x 100 = 40%
Formula
Percentage change = [(777 - 555) / 555] x 100
Subtract the new number by the original number
777 - 555 = 222
222 ÷ 555 = 0.4
0.4 x 100 = 40%
Example