98.93% is the change from 280 to 557
Calculation steps:
[( 557 - 280 ) ÷ 280] x 100 = 98.93%
Formula
Percentage change = [(557 - 280) / 280] x 100
Subtract the new number by the original number
557 - 280 = 277
277 ÷ 280 = 0.9892857142857143
0.9892857142857143 x 100 = 98.93%