-50% is the change from 566 to 283
Calculation steps:
[( 283 - 566 ) ÷ 566] x 100 = -50%
Formula
Percentage change = [(283 - 566) / 566] x 100
Subtract the new number by the original number
283 - 566 = -283
-283 ÷ 566 = -0.5
-0.5 x 100 = -50%
Example