50.09% is the change from 577 to 866
Calculation steps:
[( 866 - 577 ) ÷ 577] x 100 = 50.09%
Formula
Percentage change = [(866 - 577) / 577] x 100
Subtract the new number by the original number
866 - 577 = 289
289 ÷ 577 = 0.5008665511265165
0.5008665511265165 x 100 = 50.09%