58.1% is the change from 525 to 830
Calculation steps:
[( 830 - 525 ) ÷ 525] x 100 = 58.1%
Formula
Percentage change = [(830 - 525) / 525] x 100
Subtract the new number by the original number
830 - 525 = 305
305 ÷ 525 = 0.580952380952381
0.580952380952381 x 100 = 58.1%