79.78% is the change from 277 to 498
Calculation steps:
[( 498 - 277 ) ÷ 277] x 100 = 79.78%
Formula
Percentage change = [(498 - 277) / 277] x 100
Subtract the new number by the original number
498 - 277 = 221
221 ÷ 277 = 0.7978339350180506
0.7978339350180506 x 100 = 79.78%