-64.93% is the change from 670 to 235
Calculation steps:
[( 235 - 670 ) ÷ 670] x 100 = -64.93%
Formula
Percentage change = [(235 - 670) / 670] x 100
Subtract the new number by the original number
235 - 670 = -435
-435 ÷ 670 = -0.6492537313432836
-0.6492537313432836 x 100 = -64.93%