-23.91% is the change from 343 to 261
Calculation steps:
[( 261 - 343 ) ÷ 343] x 100 = -23.91%
Formula
Percentage change = [(261 - 343) / 343] x 100
Subtract the new number by the original number
261 - 343 = -82
-82 ÷ 343 = -0.239067055393586
-0.239067055393586 x 100 = -23.91%