-36.87% is the change from 670 to 423
Calculation steps:
[( 423 - 670 ) ÷ 670] x 100 = -36.87%
Formula
Percentage change = [(423 - 670) / 670] x 100
Subtract the new number by the original number
423 - 670 = -247
-247 ÷ 670 = -0.3686567164179104
-0.3686567164179104 x 100 = -36.87%