-30.34% is the change from 445 to 310
Calculation steps:
[( 310 - 445 ) ÷ 445] x 100 = -30.34%
Formula
Percentage change = [(310 - 445) / 445] x 100
Subtract the new number by the original number
310 - 445 = -135
-135 ÷ 445 = -0.30337078651685395
-0.30337078651685395 x 100 = -30.34%