50.78% is the change from 577 to 870
Calculation steps:
[( 870 - 577 ) ÷ 577] x 100 = 50.78%
Formula
Percentage change = [(870 - 577) / 577] x 100
Subtract the new number by the original number
870 - 577 = 293
293 ÷ 577 = 0.5077989601386482
0.5077989601386482 x 100 = 50.78%