100% is the change from 277 to 554
Calculation steps:
[( 554 - 277 ) ÷ 277] x 100 = 100%
Formula
Percentage change = [(554 - 277) / 277] x 100
Subtract the new number by the original number
554 - 277 = 277
277 ÷ 277 = 1
1 x 100 = 100%
Example