66.17% is the change from 402 to 668
Calculation steps:
[( 668 - 402 ) ÷ 402] x 100 = 66.17%
Formula
Percentage change = [(668 - 402) / 402] x 100
Subtract the new number by the original number
668 - 402 = 266
266 ÷ 402 = 0.6616915422885572
0.6616915422885572 x 100 = 66.17%