-16.7% is the change from 545 to 454
Calculation steps:
[( 454 - 545 ) ÷ 545] x 100 = -16.7%
Formula
Percentage change = [(454 - 545) / 545] x 100
Subtract the new number by the original number
454 - 545 = -91
-91 ÷ 545 = -0.1669724770642202
-0.1669724770642202 x 100 = -16.7%