72.5% is the change from 320 to 552
Calculation steps:
[( 552 - 320 ) ÷ 320] x 100 = 72.5%
Formula
Percentage change = [(552 - 320) / 320] x 100
Subtract the new number by the original number
552 - 320 = 232
232 ÷ 320 = 0.725
0.725 x 100 = 72.5%
Example