-82.4% is the change from 551 to 97
Calculation steps:
[( 97 - 551 ) ÷ 551] x 100 = -82.4%
Formula
Percentage change = [(97 - 551) / 551] x 100
Subtract the new number by the original number
97 - 551 = -454
-454 ÷ 551 = -0.8239564428312159
-0.8239564428312159 x 100 = -82.4%