-29.75% is the change from 669 to 470
Calculation steps:
[( 470 - 669 ) ÷ 669] x 100 = -29.75%
Formula
Percentage change = [(470 - 669) / 669] x 100
Subtract the new number by the original number
470 - 669 = -199
-199 ÷ 669 = -0.2974588938714499
-0.2974588938714499 x 100 = -29.75%