68.49% is the change from 511 to 861
Calculation steps:
[( 861 - 511 ) ÷ 511] x 100 = 68.49%
Formula
Percentage change = [(861 - 511) / 511] x 100
Subtract the new number by the original number
861 - 511 = 350
350 ÷ 511 = 0.684931506849315
0.684931506849315 x 100 = 68.49%