62.7% is the change from 311 to 506
Calculation steps:
[( 506 - 311 ) ÷ 311] x 100 = 62.7%
Formula
Percentage change = [(506 - 311) / 311] x 100
Subtract the new number by the original number
506 - 311 = 195
195 ÷ 311 = 0.6270096463022508
0.6270096463022508 x 100 = 62.7%