-40.88% is the change from 543 to 321
Calculation steps:
[( 321 - 543 ) ÷ 543] x 100 = -40.88%
Formula
Percentage change = [(321 - 543) / 543] x 100
Subtract the new number by the original number
321 - 543 = -222
-222 ÷ 543 = -0.4088397790055249
-0.4088397790055249 x 100 = -40.88%