-45.48% is the change from 343 to 187
Calculation steps:
[( 187 - 343 ) ÷ 343] x 100 = -45.48%
Formula
Percentage change = [(187 - 343) / 343] x 100
Subtract the new number by the original number
187 - 343 = -156
-156 ÷ 343 = -0.45481049562682213
-0.45481049562682213 x 100 = -45.48%