48.44% is the change from 320 to 475
Calculation steps:
[( 475 - 320 ) ÷ 320] x 100 = 48.44%
Formula
Percentage change = [(475 - 320) / 320] x 100
Subtract the new number by the original number
475 - 320 = 155
155 ÷ 320 = 0.484375
0.484375 x 100 = 48.44%