3828.57% is the change from 21 to 825
Calculation steps:
[( 825 - 21 ) ÷ 21] x 100 = 3828.57%
Formula
Percentage change = [(825 - 21) / 21] x 100
Subtract the new number by the original number
825 - 21 = 804
804 ÷ 21 = 38.285714285714285
38.285714285714285 x 100 = 3828.57%