-65.77% is the change from 818 to 280
Calculation steps:
[( 280 - 818 ) ÷ 818] x 100 = -65.77%
Formula
Percentage change = [(280 - 818) / 818] x 100
Subtract the new number by the original number
280 - 818 = -538
-538 ÷ 818 = -0.6577017114914425
-0.6577017114914425 x 100 = -65.77%