21000% is the change from 4 to 844
Calculation steps:
[( 844 - 4 ) ÷ 4] x 100 = 21000%
Formula
Percentage change = [(844 - 4) / 4] x 100
Subtract the new number by the original number
844 - 4 = 840
840 ÷ 4 = 210
210 x 100 = 21000%
Example