-34.93% is the change from 670 to 436
Calculation steps:
[( 436 - 670 ) ÷ 670] x 100 = -34.93%
Formula
Percentage change = [(436 - 670) / 670] x 100
Subtract the new number by the original number
436 - 670 = -234
-234 ÷ 670 = -0.3492537313432836
-0.3492537313432836 x 100 = -34.93%