1809.52% is the change from 21 to 401
Calculation steps:
[( 401 - 21 ) ÷ 21] x 100 = 1809.52%
Formula
Percentage change = [(401 - 21) / 21] x 100
Subtract the new number by the original number
401 - 21 = 380
380 ÷ 21 = 18.095238095238095
18.095238095238095 x 100 = 1809.52%