64.84% is the change from 310 to 511
Calculation steps:
[( 511 - 310 ) ÷ 310] x 100 = 64.84%
Formula
Percentage change = [(511 - 310) / 310] x 100
Subtract the new number by the original number
511 - 310 = 201
201 ÷ 310 = 0.6483870967741936
0.6483870967741936 x 100 = 64.84%