69.47% is the change from 393 to 666
Calculation steps:
[( 666 - 393 ) ÷ 393] x 100 = 69.47%
Formula
Percentage change = [(666 - 393) / 393] x 100
Subtract the new number by the original number
666 - 393 = 273
273 ÷ 393 = 0.6946564885496184
0.6946564885496184 x 100 = 69.47%