88.75% is the change from 320 to 604
Calculation steps:
[( 604 - 320 ) ÷ 320] x 100 = 88.75%
Formula
Percentage change = [(604 - 320) / 320] x 100
Subtract the new number by the original number
604 - 320 = 284
284 ÷ 320 = 0.8875
0.8875 x 100 = 88.75%