63.81% is the change from 409 to 670
Calculation steps:
[( 670 - 409 ) ÷ 409] x 100 = 63.81%
Formula
Percentage change = [(670 - 409) / 409] x 100
Subtract the new number by the original number
670 - 409 = 261
261 ÷ 409 = 0.6381418092909535
0.6381418092909535 x 100 = 63.81%