166% is the change from 100 to 266
Calculation steps:
[( 266 - 100 ) ÷ 100] x 100 = 166%
Formula
Percentage change = [(266 - 100) / 100] x 100
Subtract the new number by the original number
266 - 100 = 166
166 ÷ 100 = 1.66
1.66 x 100 = 166%
Example