-4.89% is the change from 818 to 778
Calculation steps:
[( 778 - 818 ) ÷ 818] x 100 = -4.89%
Formula
Percentage change = [(778 - 818) / 818] x 100
Subtract the new number by the original number
778 - 818 = -40
-40 ÷ 818 = -0.0488997555012225
-0.0488997555012225 x 100 = -4.89%