-37.21% is the change from 430 to 270
Calculation steps:
[( 270 - 430 ) ÷ 430] x 100 = -37.21%
Formula
Percentage change = [(270 - 430) / 430] x 100
Subtract the new number by the original number
270 - 430 = -160
-160 ÷ 430 = -0.37209302325581395
-0.37209302325581395 x 100 = -37.21%