159.14% is the change from 257 to 666
Calculation steps:
[( 666 - 257 ) ÷ 257] x 100 = 159.14%
Formula
Percentage change = [(666 - 257) / 257] x 100
Subtract the new number by the original number
666 - 257 = 409
409 ÷ 257 = 1.5914396887159532
1.5914396887159532 x 100 = 159.14%