75% is the change from 320 to 560
Calculation steps:
[( 560 - 320 ) ÷ 320] x 100 = 75%
Formula
Percentage change = [(560 - 320) / 320] x 100
Subtract the new number by the original number
560 - 320 = 240
240 ÷ 320 = 0.75
0.75 x 100 = 75%
Example