139.16% is the change from 166 to 397
Calculation steps:
[( 397 - 166 ) ÷ 166] x 100 = 139.16%
Formula
Percentage change = [(397 - 166) / 166] x 100
Subtract the new number by the original number
397 - 166 = 231
231 ÷ 166 = 1.391566265060241
1.391566265060241 x 100 = 139.16%