-10% is the change from 470 to 423
Calculation steps:
[( 423 - 470 ) ÷ 470] x 100 = -10%
Formula
Percentage change = [(423 - 470) / 470] x 100
Subtract the new number by the original number
423 - 470 = -47
-47 ÷ 470 = -0.1
-0.1 x 100 = -10%
Example