-32.09% is the change from 670 to 455
Calculation steps:
[( 455 - 670 ) ÷ 670] x 100 = -32.09%
Formula
Percentage change = [(455 - 670) / 670] x 100
Subtract the new number by the original number
455 - 670 = -215
-215 ÷ 670 = -0.3208955223880597
-0.3208955223880597 x 100 = -32.09%