166% is the change from 150 to 399
Calculation steps:
[( 399 - 150 ) ÷ 150] x 100 = 166%
Formula
Percentage change = [(399 - 150) / 150] x 100
Subtract the new number by the original number
399 - 150 = 249
249 ÷ 150 = 1.66
1.66 x 100 = 166%
Example