-7.16% is the change from 545 to 506
Calculation steps:
[( 506 - 545 ) ÷ 545] x 100 = -7.16%
Formula
Percentage change = [(506 - 545) / 545] x 100
Subtract the new number by the original number
506 - 545 = -39
-39 ÷ 545 = -0.07155963302752294
-0.07155963302752294 x 100 = -7.16%