65.5% is the change from 400 to 662
Calculation steps:
[( 662 - 400 ) ÷ 400] x 100 = 65.5%
Formula
Percentage change = [(662 - 400) / 400] x 100
Subtract the new number by the original number
662 - 400 = 262
262 ÷ 400 = 0.655
0.655 x 100 = 65.5%
Example