88.44% is the change from 320 to 603
Calculation steps:
[( 603 - 320 ) ÷ 320] x 100 = 88.44%
Formula
Percentage change = [(603 - 320) / 320] x 100
Subtract the new number by the original number
603 - 320 = 283
283 ÷ 320 = 0.884375
0.884375 x 100 = 88.44%