21.11% is the change from 450 to 545
Calculation steps:
[( 545 - 450 ) ÷ 450] x 100 = 21.11%
Formula
Percentage change = [(545 - 450) / 450] x 100
Subtract the new number by the original number
545 - 450 = 95
95 ÷ 450 = 0.2111111111111111
0.2111111111111111 x 100 = 21.11%