63.86% is the change from 523 to 857
Calculation steps:
[( 857 - 523 ) ÷ 523] x 100 = 63.86%
Formula
Percentage change = [(857 - 523) / 523] x 100
Subtract the new number by the original number
857 - 523 = 334
334 ÷ 523 = 0.638623326959847
0.638623326959847 x 100 = 63.86%