-17.02% is the change from 664 to 551
Calculation steps:
[( 551 - 664 ) ÷ 664] x 100 = -17.02%
Formula
Percentage change = [(551 - 664) / 664] x 100
Subtract the new number by the original number
551 - 664 = -113
-113 ÷ 664 = -0.17018072289156627
-0.17018072289156627 x 100 = -17.02%