-2.56% is the change from 313 to 305
Calculation steps:
[( 305 - 313 ) ÷ 313] x 100 = -2.56%
Formula
Percentage change = [(305 - 313) / 313] x 100
Subtract the new number by the original number
305 - 313 = -8
-8 ÷ 313 = -0.025559105431309903
-0.025559105431309903 x 100 = -2.56%