-26.7% is the change from 678 to 497
Calculation steps:
[( 497 - 678 ) ÷ 678] x 100 = -26.7%
Formula
Percentage change = [(497 - 678) / 678] x 100
Subtract the new number by the original number
497 - 678 = -181
-181 ÷ 678 = -0.2669616519174041
-0.2669616519174041 x 100 = -26.7%