-5.04% is the change from 337 to 320
Calculation steps:
[( 320 - 337 ) ÷ 337] x 100 = -5.04%
Formula
Percentage change = [(320 - 337) / 337] x 100
Subtract the new number by the original number
320 - 337 = -17
-17 ÷ 337 = -0.050445103857566766
-0.050445103857566766 x 100 = -5.04%