-17.27% is the change from 666 to 551
Calculation steps:
[( 551 - 666 ) ÷ 666] x 100 = -17.27%
Formula
Percentage change = [(551 - 666) / 666] x 100
Subtract the new number by the original number
551 - 666 = -115
-115 ÷ 666 = -0.17267267267267267
-0.17267267267267267 x 100 = -17.27%