-51.64% is the change from 670 to 324
Calculation steps:
[( 324 - 670 ) ÷ 670] x 100 = -51.64%
Formula
Percentage change = [(324 - 670) / 670] x 100
Subtract the new number by the original number
324 - 670 = -346
-346 ÷ 670 = -0.5164179104477612
-0.5164179104477612 x 100 = -51.64%