166.15% is the change from 257 to 684
Calculation steps:
[( 684 - 257 ) ÷ 257] x 100 = 166.15%
Formula
Percentage change = [(684 - 257) / 257] x 100
Subtract the new number by the original number
684 - 257 = 427
427 ÷ 257 = 1.66147859922179
1.66147859922179 x 100 = 166.15%