-8.88% is the change from 349 to 318
Calculation steps:
[( 318 - 349 ) ÷ 349] x 100 = -8.88%
Formula
Percentage change = [(318 - 349) / 349] x 100
Subtract the new number by the original number
318 - 349 = -31
-31 ÷ 349 = -0.08882521489971347
-0.08882521489971347 x 100 = -8.88%