-3.89% is the change from 334 to 321
Calculation steps:
[( 321 - 334 ) ÷ 334] x 100 = -3.89%
Formula
Percentage change = [(321 - 334) / 334] x 100
Subtract the new number by the original number
321 - 334 = -13
-13 ÷ 334 = -0.038922155688622756
-0.038922155688622756 x 100 = -3.89%