60.94% is the change from 320 to 515
Calculation steps:
[( 515 - 320 ) ÷ 320] x 100 = 60.94%
Formula
Percentage change = [(515 - 320) / 320] x 100
Subtract the new number by the original number
515 - 320 = 195
195 ÷ 320 = 0.609375
0.609375 x 100 = 60.94%