160.7% is the change from 257 to 670
Calculation steps:
[( 670 - 257 ) ÷ 257] x 100 = 160.7%
Formula
Percentage change = [(670 - 257) / 257] x 100
Subtract the new number by the original number
670 - 257 = 413
413 ÷ 257 = 1.6070038910505837
1.6070038910505837 x 100 = 160.7%