59.69% is the change from 320 to 511
Calculation steps:
[( 511 - 320 ) ÷ 320] x 100 = 59.69%
Formula
Percentage change = [(511 - 320) / 320] x 100
Subtract the new number by the original number
511 - 320 = 191
191 ÷ 320 = 0.596875
0.596875 x 100 = 59.69%