-40.55% is the change from 545 to 324
Calculation steps:
[( 324 - 545 ) ÷ 545] x 100 = -40.55%
Formula
Percentage change = [(324 - 545) / 545] x 100
Subtract the new number by the original number
324 - 545 = -221
-221 ÷ 545 = -0.4055045871559633
-0.4055045871559633 x 100 = -40.55%