-3.09% is the change from 291 to 282
Calculation steps:
[( 282 - 291 ) ÷ 291] x 100 = -3.09%
Formula
Percentage change = [(282 - 291) / 291] x 100
Subtract the new number by the original number
282 - 291 = -9
-9 ÷ 291 = -0.030927835051546393
-0.030927835051546393 x 100 = -3.09%