77.81% is the change from 311 to 553
Calculation steps:
[( 553 - 311 ) ÷ 311] x 100 = 77.81%
Formula
Percentage change = [(553 - 311) / 311] x 100
Subtract the new number by the original number
553 - 311 = 242
242 ÷ 311 = 0.7781350482315113
0.7781350482315113 x 100 = 77.81%