-24.18% is the change from 670 to 508
Calculation steps:
[( 508 - 670 ) ÷ 670] x 100 = -24.18%
Formula
Percentage change = [(508 - 670) / 670] x 100
Subtract the new number by the original number
508 - 670 = -162
-162 ÷ 670 = -0.2417910447761194
-0.2417910447761194 x 100 = -24.18%