2155% is the change from 20 to 451
Calculation steps:
[( 451 - 20 ) ÷ 20] x 100 = 2155%
Formula
Percentage change = [(451 - 20) / 20] x 100
Subtract the new number by the original number
451 - 20 = 431
431 ÷ 20 = 21.55
21.55 x 100 = 2155%
Example