-27.66% is the change from 470 to 340
Calculation steps:
[( 340 - 470 ) ÷ 470] x 100 = -27.66%
Formula
Percentage change = [(340 - 470) / 470] x 100
Subtract the new number by the original number
340 - 470 = -130
-130 ÷ 470 = -0.2765957446808511
-0.2765957446808511 x 100 = -27.66%