-7.83% is the change from 345 to 318
Calculation steps:
[( 318 - 345 ) ÷ 345] x 100 = -7.83%
Formula
Percentage change = [(318 - 345) / 345] x 100
Subtract the new number by the original number
318 - 345 = -27
-27 ÷ 345 = -0.0782608695652174
-0.0782608695652174 x 100 = -7.83%