-36.08% is the change from 485 to 310
Calculation steps:
[( 310 - 485 ) ÷ 485] x 100 = -36.08%
Formula
Percentage change = [(310 - 485) / 485] x 100
Subtract the new number by the original number
310 - 485 = -175
-175 ÷ 485 = -0.36082474226804123
-0.36082474226804123 x 100 = -36.08%