81.45% is the change from 318 to 577
Calculation steps:
[( 577 - 318 ) ÷ 318] x 100 = 81.45%
Formula
Percentage change = [(577 - 318) / 318] x 100
Subtract the new number by the original number
577 - 318 = 259
259 ÷ 318 = 0.8144654088050315
0.8144654088050315 x 100 = 81.45%