-9.14% is the change from 350 to 318
Calculation steps:
[( 318 - 350 ) ÷ 350] x 100 = -9.14%
Formula
Percentage change = [(318 - 350) / 350] x 100
Subtract the new number by the original number
318 - 350 = -32
-32 ÷ 350 = -0.09142857142857143
-0.09142857142857143 x 100 = -9.14%