4550% is the change from 18 to 837
Calculation steps:
[( 837 - 18 ) ÷ 18] x 100 = 4550%
Formula
Percentage change = [(837 - 18) / 18] x 100
Subtract the new number by the original number
837 - 18 = 819
819 ÷ 18 = 45.5
45.5 x 100 = 4550%
Example