-30.6% is the change from 670 to 465
Calculation steps:
[( 465 - 670 ) ÷ 670] x 100 = -30.6%
Formula
Percentage change = [(465 - 670) / 670] x 100
Subtract the new number by the original number
465 - 670 = -205
-205 ÷ 670 = -0.30597014925373134
-0.30597014925373134 x 100 = -30.6%