-90.02% is the change from 551 to 55
Calculation steps:
[( 55 - 551 ) ÷ 551] x 100 = -90.02%
Formula
Percentage change = [(55 - 551) / 551] x 100
Subtract the new number by the original number
55 - 551 = -496
-496 ÷ 551 = -0.9001814882032668
-0.9001814882032668 x 100 = -90.02%