78.78% is the change from 278 to 497
Calculation steps:
[( 497 - 278 ) ÷ 278] x 100 = 78.78%
Formula
Percentage change = [(497 - 278) / 278] x 100
Subtract the new number by the original number
497 - 278 = 219
219 ÷ 278 = 0.7877697841726619
0.7877697841726619 x 100 = 78.78%