-27.7% is the change from 343 to 248
Calculation steps:
[( 248 - 343 ) ÷ 343] x 100 = -27.7%
Formula
Percentage change = [(248 - 343) / 343] x 100
Subtract the new number by the original number
248 - 343 = -95
-95 ÷ 343 = -0.27696793002915454
-0.27696793002915454 x 100 = -27.7%