165.6% is the change from 250 to 664
Calculation steps:
[( 664 - 250 ) ÷ 250] x 100 = 165.6%
Formula
Percentage change = [(664 - 250) / 250] x 100
Subtract the new number by the original number
664 - 250 = 414
414 ÷ 250 = 1.656
1.656 x 100 = 165.6%
Example