67.86% is the change from 280 to 470
Calculation steps:
[( 470 - 280 ) ÷ 280] x 100 = 67.86%
Formula
Percentage change = [(470 - 280) / 280] x 100
Subtract the new number by the original number
470 - 280 = 190
190 ÷ 280 = 0.6785714285714286
0.6785714285714286 x 100 = 67.86%