75.31% is the change from 320 to 561
Calculation steps:
[( 561 - 320 ) ÷ 320] x 100 = 75.31%
Formula
Percentage change = [(561 - 320) / 320] x 100
Subtract the new number by the original number
561 - 320 = 241
241 ÷ 320 = 0.753125
0.753125 x 100 = 75.31%