329.53% is the change from 149 to 640
Calculation steps:
[( 640 - 149 ) ÷ 149] x 100 = 329.53%
Formula
Percentage change = [(640 - 149) / 149] x 100
Subtract the new number by the original number
640 - 149 = 491
491 ÷ 149 = 3.295302013422819
3.295302013422819 x 100 = 329.53%