-96.55% is the change from 551 to 19
Calculation steps:
[( 19 - 551 ) ÷ 551] x 100 = -96.55%
Formula
Percentage change = [(19 - 551) / 551] x 100
Subtract the new number by the original number
19 - 551 = -532
-532 ÷ 551 = -0.9655172413793104
-0.9655172413793104 x 100 = -96.55%