4230% is the change from 20 to 866
Calculation steps:
[( 866 - 20 ) ÷ 20] x 100 = 4230%
Formula
Percentage change = [(866 - 20) / 20] x 100
Subtract the new number by the original number
866 - 20 = 846
846 ÷ 20 = 42.3
42.3 x 100 = 4230%
Example