-2.17% is the change from 322 to 315
Calculation steps:
[( 315 - 322 ) ÷ 322] x 100 = -2.17%
Formula
Percentage change = [(315 - 322) / 322] x 100
Subtract the new number by the original number
315 - 322 = -7
-7 ÷ 322 = -0.021739130434782608
-0.021739130434782608 x 100 = -2.17%