-42% is the change from 950 to 551
Calculation steps:
[( 551 - 950 ) ÷ 950] x 100 = -42%
Formula
Percentage change = [(551 - 950) / 950] x 100
Subtract the new number by the original number
551 - 950 = -399
-399 ÷ 950 = -0.42
-0.42 x 100 = -42%
Example