-17.92% is the change from 826 to 678
Calculation steps:
[( 678 - 826 ) ÷ 826] x 100 = -17.92%
Formula
Percentage change = [(678 - 826) / 826] x 100
Subtract the new number by the original number
678 - 826 = -148
-148 ÷ 826 = -0.1791767554479419
-0.1791767554479419 x 100 = -17.92%