66.08% is the change from 401 to 666
Calculation steps:
[( 666 - 401 ) ÷ 401] x 100 = 66.08%
Formula
Percentage change = [(666 - 401) / 401] x 100
Subtract the new number by the original number
666 - 401 = 265
265 ÷ 401 = 0.6608478802992519
0.6608478802992519 x 100 = 66.08%