91.56% is the change from 320 to 613
Calculation steps:
[( 613 - 320 ) ÷ 320] x 100 = 91.56%
Formula
Percentage change = [(613 - 320) / 320] x 100
Subtract the new number by the original number
613 - 320 = 293
293 ÷ 320 = 0.915625
0.915625 x 100 = 91.56%