-7.66% is the change from 235 to 217
Calculation steps:
[( 217 - 235 ) ÷ 235] x 100 = -7.66%
Formula
Percentage change = [(217 - 235) / 235] x 100
Subtract the new number by the original number
217 - 235 = -18
-18 ÷ 235 = -0.07659574468085106
-0.07659574468085106 x 100 = -7.66%