-31.2% is the change from 343 to 236
Calculation steps:
[( 236 - 343 ) ÷ 343] x 100 = -31.2%
Formula
Percentage change = [(236 - 343) / 343] x 100
Subtract the new number by the original number
236 - 343 = -107
-107 ÷ 343 = -0.3119533527696793
-0.3119533527696793 x 100 = -31.2%