-6.75% is the change from 311 to 290
Calculation steps:
[( 290 - 311 ) ÷ 311] x 100 = -6.75%
Formula
Percentage change = [(290 - 311) / 311] x 100
Subtract the new number by the original number
290 - 311 = -21
-21 ÷ 311 = -0.06752411575562701
-0.06752411575562701 x 100 = -6.75%