-34.78% is the change from 670 to 437
Calculation steps:
[( 437 - 670 ) ÷ 670] x 100 = -34.78%
Formula
Percentage change = [(437 - 670) / 670] x 100
Subtract the new number by the original number
437 - 670 = -233
-233 ÷ 670 = -0.34776119402985073
-0.34776119402985073 x 100 = -34.78%