-73.68% is the change from 551 to 145
Calculation steps:
[( 145 - 551 ) ÷ 551] x 100 = -73.68%
Formula
Percentage change = [(145 - 551) / 551] x 100
Subtract the new number by the original number
145 - 551 = -406
-406 ÷ 551 = -0.7368421052631579
-0.7368421052631579 x 100 = -73.68%