80% is the change from 310 to 558
Calculation steps:
[( 558 - 310 ) ÷ 310] x 100 = 80%
Formula
Percentage change = [(558 - 310) / 310] x 100
Subtract the new number by the original number
558 - 310 = 248
248 ÷ 310 = 0.8
0.8 x 100 = 80%
Example