8.5% is the change from 153 to 166
Calculation steps:
[( 166 - 153 ) ÷ 153] x 100 = 8.5%
Formula
Percentage change = [(166 - 153) / 153] x 100
Subtract the new number by the original number
166 - 153 = 13
13 ÷ 153 = 0.08496732026143791
0.08496732026143791 x 100 = 8.5%