290.24% is the change from 164 to 640
Calculation steps:
[( 640 - 164 ) ÷ 164] x 100 = 290.24%
Formula
Percentage change = [(640 - 164) / 164] x 100
Subtract the new number by the original number
640 - 164 = 476
476 ÷ 164 = 2.902439024390244
2.902439024390244 x 100 = 290.24%