-69.55% is the change from 670 to 204
Calculation steps:
[( 204 - 670 ) ÷ 670] x 100 = -69.55%
Formula
Percentage change = [(204 - 670) / 670] x 100
Subtract the new number by the original number
204 - 670 = -466
-466 ÷ 670 = -0.6955223880597015
-0.6955223880597015 x 100 = -69.55%