7.02% is the change from 285 to 305
Calculation steps:
[( 305 - 285 ) ÷ 285] x 100 = 7.02%
Formula
Percentage change = [(305 - 285) / 285] x 100
Subtract the new number by the original number
305 - 285 = 20
20 ÷ 285 = 0.07017543859649122
0.07017543859649122 x 100 = 7.02%