-15.02% is the change from 506 to 430
Calculation steps:
[( 430 - 506 ) ÷ 506] x 100 = -15.02%
Formula
Percentage change = [(430 - 506) / 506] x 100
Subtract the new number by the original number
430 - 506 = -76
-76 ÷ 506 = -0.15019762845849802
-0.15019762845849802 x 100 = -15.02%