99.28% is the change from 278 to 554
Calculation steps:
[( 554 - 278 ) ÷ 278] x 100 = 99.28%
Formula
Percentage change = [(554 - 278) / 278] x 100
Subtract the new number by the original number
554 - 278 = 276
276 ÷ 278 = 0.9928057553956835
0.9928057553956835 x 100 = 99.28%