3709.52% is the change from 21 to 800
Calculation steps:
[( 800 - 21 ) ÷ 21] x 100 = 3709.52%
Formula
Percentage change = [(800 - 21) / 21] x 100
Subtract the new number by the original number
800 - 21 = 779
779 ÷ 21 = 37.095238095238095
37.095238095238095 x 100 = 3709.52%