-34.74% is the change from 665 to 434
Calculation steps:
[( 434 - 665 ) ÷ 665] x 100 = -34.74%
Formula
Percentage change = [(434 - 665) / 665] x 100
Subtract the new number by the original number
434 - 665 = -231
-231 ÷ 665 = -0.3473684210526316
-0.3473684210526316 x 100 = -34.74%