-27.83% is the change from 345 to 249
Calculation steps:
[( 249 - 345 ) ÷ 345] x 100 = -27.83%
Formula
Percentage change = [(249 - 345) / 345] x 100
Subtract the new number by the original number
249 - 345 = -96
-96 ÷ 345 = -0.2782608695652174
-0.2782608695652174 x 100 = -27.83%