2100% is the change from 38 to 836
Calculation steps:
[( 836 - 38 ) ÷ 38] x 100 = 2100%
Formula
Percentage change = [(836 - 38) / 38] x 100
Subtract the new number by the original number
836 - 38 = 798
798 ÷ 38 = 21
21 x 100 = 2100%
Example