7.23% is the change from 166 to 178
Calculation steps:
[( 178 - 166 ) ÷ 166] x 100 = 7.23%
Formula
Percentage change = [(178 - 166) / 166] x 100
Subtract the new number by the original number
178 - 166 = 12
12 ÷ 166 = 0.07228915662650602
0.07228915662650602 x 100 = 7.23%