75.36% is the change from 280 to 491
Calculation steps:
[( 491 - 280 ) ÷ 280] x 100 = 75.36%
Formula
Percentage change = [(491 - 280) / 280] x 100
Subtract the new number by the original number
491 - 280 = 211
211 ÷ 280 = 0.7535714285714286
0.7535714285714286 x 100 = 75.36%