-9.03% is the change from 310 to 282
Calculation steps:
[( 282 - 310 ) ÷ 310] x 100 = -9.03%
Formula
Percentage change = [(282 - 310) / 310] x 100
Subtract the new number by the original number
282 - 310 = -28
-28 ÷ 310 = -0.09032258064516129
-0.09032258064516129 x 100 = -9.03%