640% is the change from 80 to 592
Calculation steps:
[( 592 - 80 ) ÷ 80] x 100 = 640%
Formula
Percentage change = [(592 - 80) / 80] x 100
Subtract the new number by the original number
592 - 80 = 512
512 ÷ 80 = 6.4
6.4 x 100 = 640%
Example