-50% is the change from 470 to 235
Calculation steps:
[( 235 - 470 ) ÷ 470] x 100 = -50%
Formula
Percentage change = [(235 - 470) / 470] x 100
Subtract the new number by the original number
235 - 470 = -235
-235 ÷ 470 = -0.5
-0.5 x 100 = -50%
Example