89.76% is the change from 166 to 315
Calculation steps:
[( 315 - 166 ) ÷ 166] x 100 = 89.76%
Formula
Percentage change = [(315 - 166) / 166] x 100
Subtract the new number by the original number
315 - 166 = 149
149 ÷ 166 = 0.8975903614457831
0.8975903614457831 x 100 = 89.76%