73.13% is the change from 320 to 554
Calculation steps:
[( 554 - 320 ) ÷ 320] x 100 = 73.13%
Formula
Percentage change = [(554 - 320) / 320] x 100
Subtract the new number by the original number
554 - 320 = 234
234 ÷ 320 = 0.73125
0.73125 x 100 = 73.13%