-9.9% is the change from 313 to 282
Calculation steps:
[( 282 - 313 ) ÷ 313] x 100 = -9.9%
Formula
Percentage change = [(282 - 313) / 313] x 100
Subtract the new number by the original number
282 - 313 = -31
-31 ÷ 313 = -0.09904153354632587
-0.09904153354632587 x 100 = -9.9%