-16.51% is the change from 545 to 455
Calculation steps:
[( 455 - 545 ) ÷ 545] x 100 = -16.51%
Formula
Percentage change = [(455 - 545) / 545] x 100
Subtract the new number by the original number
455 - 545 = -90
-90 ÷ 545 = -0.1651376146788991
-0.1651376146788991 x 100 = -16.51%