-17.72% is the change from 824 to 678
Calculation steps:
[( 678 - 824 ) ÷ 824] x 100 = -17.72%
Formula
Percentage change = [(678 - 824) / 824] x 100
Subtract the new number by the original number
678 - 824 = -146
-146 ÷ 824 = -0.17718446601941748
-0.17718446601941748 x 100 = -17.72%