4511.11% is the change from 18 to 830
Calculation steps:
[( 830 - 18 ) ÷ 18] x 100 = 4511.11%
Formula
Percentage change = [(830 - 18) / 18] x 100
Subtract the new number by the original number
830 - 18 = 812
812 ÷ 18 = 45.111111111111114
45.111111111111114 x 100 = 4511.11%