156.81% is the change from 257 to 660
Calculation steps:
[( 660 - 257 ) ÷ 257] x 100 = 156.81%
Formula
Percentage change = [(660 - 257) / 257] x 100
Subtract the new number by the original number
660 - 257 = 403
403 ÷ 257 = 1.5680933852140078
1.5680933852140078 x 100 = 156.81%