3928.57% is the change from 21 to 846
Calculation steps:
[( 846 - 21 ) ÷ 21] x 100 = 3928.57%
Formula
Percentage change = [(846 - 21) / 21] x 100
Subtract the new number by the original number
846 - 21 = 825
825 ÷ 21 = 39.285714285714285
39.285714285714285 x 100 = 3928.57%