-64.99% is the change from 817 to 286
Calculation steps:
[( 286 - 817 ) ÷ 817] x 100 = -64.99%
Formula
Percentage change = [(286 - 817) / 817] x 100
Subtract the new number by the original number
286 - 817 = -531
-531 ÷ 817 = -0.6499388004895961
-0.6499388004895961 x 100 = -64.99%