31.31% is the change from 511 to 671
Calculation steps:
[( 671 - 511 ) ÷ 511] x 100 = 31.31%
Formula
Percentage change = [(671 - 511) / 511] x 100
Subtract the new number by the original number
671 - 511 = 160
160 ÷ 511 = 0.3131115459882583
0.3131115459882583 x 100 = 31.31%