-88.02% is the change from 551 to 66
Calculation steps:
[( 66 - 551 ) ÷ 551] x 100 = -88.02%
Formula
Percentage change = [(66 - 551) / 551] x 100
Subtract the new number by the original number
66 - 551 = -485
-485 ÷ 551 = -0.8802177858439202
-0.8802177858439202 x 100 = -88.02%