-16.33% is the change from 343 to 287
Calculation steps:
[( 287 - 343 ) ÷ 343] x 100 = -16.33%
Formula
Percentage change = [(287 - 343) / 343] x 100
Subtract the new number by the original number
287 - 343 = -56
-56 ÷ 343 = -0.16326530612244897
-0.16326530612244897 x 100 = -16.33%