-7.69% is the change from 234 to 216
Calculation steps:
[( 216 - 234 ) ÷ 234] x 100 = -7.69%
Formula
Percentage change = [(216 - 234) / 234] x 100
Subtract the new number by the original number
216 - 234 = -18
-18 ÷ 234 = -0.07692307692307693
-0.07692307692307693 x 100 = -7.69%