-20.6% is the change from 432 to 343
Calculation steps:
[( 343 - 432 ) ÷ 432] x 100 = -20.6%
Formula
Percentage change = [(343 - 432) / 432] x 100
Subtract the new number by the original number
343 - 432 = -89
-89 ÷ 432 = -0.20601851851851852
-0.20601851851851852 x 100 = -20.6%