-69.73% is the change from 816 to 247
Calculation steps:
[( 247 - 816 ) ÷ 816] x 100 = -69.73%
Formula
Percentage change = [(247 - 816) / 816] x 100
Subtract the new number by the original number
247 - 816 = -569
-569 ÷ 816 = -0.6973039215686274
-0.6973039215686274 x 100 = -69.73%