78.44% is the change from 320 to 571
Calculation steps:
[( 571 - 320 ) ÷ 320] x 100 = 78.44%
Formula
Percentage change = [(571 - 320) / 320] x 100
Subtract the new number by the original number
571 - 320 = 251
251 ÷ 320 = 0.784375
0.784375 x 100 = 78.44%