2047.62% is the change from 21 to 451
Calculation steps:
[( 451 - 21 ) ÷ 21] x 100 = 2047.62%
Formula
Percentage change = [(451 - 21) / 21] x 100
Subtract the new number by the original number
451 - 21 = 430
430 ÷ 21 = 20.476190476190474
20.476190476190474 x 100 = 2047.62%