-7.89% is the change from 545 to 502
Calculation steps:
[( 502 - 545 ) ÷ 545] x 100 = -7.89%
Formula
Percentage change = [(502 - 545) / 545] x 100
Subtract the new number by the original number
502 - 545 = -43
-43 ÷ 545 = -0.07889908256880734
-0.07889908256880734 x 100 = -7.89%