-69.25% is the change from 670 to 206
Calculation steps:
[( 206 - 670 ) ÷ 670] x 100 = -69.25%
Formula
Percentage change = [(206 - 670) / 670] x 100
Subtract the new number by the original number
206 - 670 = -464
-464 ÷ 670 = -0.6925373134328359
-0.6925373134328359 x 100 = -69.25%