76.53% is the change from 311 to 549
Calculation steps:
[( 549 - 311 ) ÷ 311] x 100 = 76.53%
Formula
Percentage change = [(549 - 311) / 311] x 100
Subtract the new number by the original number
549 - 311 = 238
238 ÷ 311 = 0.7652733118971061
0.7652733118971061 x 100 = 76.53%