-20.37% is the change from 545 to 434
Calculation steps:
[( 434 - 545 ) ÷ 545] x 100 = -20.37%
Formula
Percentage change = [(434 - 545) / 545] x 100
Subtract the new number by the original number
434 - 545 = -111
-111 ÷ 545 = -0.2036697247706422
-0.2036697247706422 x 100 = -20.37%