-32.68% is the change from 817 to 550
Calculation steps:
[( 550 - 817 ) ÷ 817] x 100 = -32.68%
Formula
Percentage change = [(550 - 817) / 817] x 100
Subtract the new number by the original number
550 - 817 = -267
-267 ÷ 817 = -0.3268053855569155
-0.3268053855569155 x 100 = -32.68%