78.78% is the change from 311 to 556
Calculation steps:
[( 556 - 311 ) ÷ 311] x 100 = 78.78%
Formula
Percentage change = [(556 - 311) / 311] x 100
Subtract the new number by the original number
556 - 311 = 245
245 ÷ 311 = 0.7877813504823151
0.7877813504823151 x 100 = 78.78%