-35.07% is the change from 670 to 435
Calculation steps:
[( 435 - 670 ) ÷ 670] x 100 = -35.07%
Formula
Percentage change = [(435 - 670) / 670] x 100
Subtract the new number by the original number
435 - 670 = -235
-235 ÷ 670 = -0.35074626865671643
-0.35074626865671643 x 100 = -35.07%