-41.74% is the change from 551 to 321
Calculation steps:
[( 321 - 551 ) ÷ 551] x 100 = -41.74%
Formula
Percentage change = [(321 - 551) / 551] x 100
Subtract the new number by the original number
321 - 551 = -230
-230 ÷ 551 = -0.41742286751361163
-0.41742286751361163 x 100 = -41.74%