71.13% is the change from 485 to 830
Calculation steps:
[( 830 - 485 ) ÷ 485] x 100 = 71.13%
Formula
Percentage change = [(830 - 485) / 485] x 100
Subtract the new number by the original number
830 - 485 = 345
345 ÷ 485 = 0.711340206185567
0.711340206185567 x 100 = 71.13%