269.94% is the change from 173 to 640
Calculation steps:
[( 640 - 173 ) ÷ 173] x 100 = 269.94%
Formula
Percentage change = [(640 - 173) / 173] x 100
Subtract the new number by the original number
640 - 173 = 467
467 ÷ 173 = 2.699421965317919
2.699421965317919 x 100 = 269.94%