80% is the change from 320 to 576
Calculation steps:
[( 576 - 320 ) ÷ 320] x 100 = 80%
Formula
Percentage change = [(576 - 320) / 320] x 100
Subtract the new number by the original number
576 - 320 = 256
256 ÷ 320 = 0.8
0.8 x 100 = 80%
Example