-69.15% is the change from 551 to 170
Calculation steps:
[( 170 - 551 ) ÷ 551] x 100 = -69.15%
Formula
Percentage change = [(170 - 551) / 551] x 100
Subtract the new number by the original number
170 - 551 = -381
-381 ÷ 551 = -0.691470054446461
-0.691470054446461 x 100 = -69.15%