-21.3% is the change from 432 to 340
Calculation steps:
[( 340 - 432 ) ÷ 432] x 100 = -21.3%
Formula
Percentage change = [(340 - 432) / 432] x 100
Subtract the new number by the original number
340 - 432 = -92
-92 ÷ 432 = -0.21296296296296297
-0.21296296296296297 x 100 = -21.3%