2138.1% is the change from 21 to 470
Calculation steps:
[( 470 - 21 ) ÷ 21] x 100 = 2138.1%
Formula
Percentage change = [(470 - 21) / 21] x 100
Subtract the new number by the original number
470 - 21 = 449
449 ÷ 21 = 21.38095238095238
21.38095238095238 x 100 = 2138.1%