70.71% is the change from 280 to 478
Calculation steps:
[( 478 - 280 ) ÷ 280] x 100 = 70.71%
Formula
Percentage change = [(478 - 280) / 280] x 100
Subtract the new number by the original number
478 - 280 = 198
198 ÷ 280 = 0.7071428571428572
0.7071428571428572 x 100 = 70.71%